Showing posts with label Expository Thoughts. Show all posts
Showing posts with label Expository Thoughts. Show all posts

Wednesday, 15 February 2012

Unhindered

Gone are the days when Christianity was a central part of the fabric of society. We now live in a society that is increasingly opposed to Christian values and practices. Christians face legal action for holding to Bible truth. Prayers are banned in public meetings. It may not be long until Christian ministers are being locked up for speaking about Jesus.

If that day comes, will it not be a tragedy? Will it not greatly hinder our efforts to see our neighbourhood and our nation reached with the gospel?

The book of Acts closes with a man in chains. In chapters 27-28 Paul arrives in Rome as a prisoner. We might expect the book to end on a high note with Paul boldly standing before Caesar and being acquitted before all the watching crowds in this magnificent city. But this does not happen. The book closes and Paul is still in chains. It is not quite the triumphant ending we were hoping for…or is it?

Before we’re tempted to despair, let us recognise that these final two chapters of Acts tell us some very important things:

Heaven is in Control
None of the events that have brought Paul to Rome are an accident. Paul has known the plan since 19:21, and Jesus has reminded him of this in 23:11. Behind all these events is the risen and reigning Lord Jesus. This does not change in the midst of the raging sea. In the midst of the storm of chapter 27, God reminds Paul that “you must stand before Caesar.” (27:24). He will arrive in Rome.

 God delivers Paul, and his fellow passengers, from the storm (27:44), and delivers Paul from a deadly snakebite. Both of these are God’s demonstration that Paul is an innocent man. Therefore, the message he proclaims ought to be listened to.

Paul’s chains and his journey to Rome are not tragic, but are in the hands of an all-powerful God who will ensure that his salvation is sent to the nations (28:28).

The Gospel is Unstoppable
The book closes with Paul still in chains. However, this is not a problem for Paul’s gospel witness. No, it is exactly the opposite! Paul’s chains create even more gospel opportunities. He has opportunity to speak to the Jews, and the final image of the book is of Paul preaching the gospel “with all boldness and without hindrance.” (28:31).

Paul’s message has been rejected by the Jews (28:25-28), and he has still not been released. Yet this is not a tragedy. No, it is a triumph. In the face of all this opposition, the gospel continues to go out unhindered.


The book of Acts closes in triumph. The gospel of the risen and reigning Lord Jesus continues to advance unhindered. Is this not a great encouragement to us in our times? Heaven is in control and the gospel is unstoppable. No power can stop the advance of the unhindered gospel. Neither the Roman empire, nor Bideford town council.

Monday, 12 December 2011

Never

Keep your life free from love of money, and be content with what you have, for he has said, “I will never leave you nor forsake you.” (Hebrews 13:5):

Stick to that word "never." It is worth its weight in gold. Cling to it as a drowning man clings to a rope. Grasp it firmly, as a soldier attacked on all sides grasps his sword. God has said, and will stand to it, "I will never leave you!"

"Never!" Though your heart often faints, and you are sick of self, and your many failures and infirmities; even then the promise will not fail.

"Never!" Though the devil whispers, 'I shall have you at last! In little while, your faith will fail, and you will be mine!' Even then, God will keep his Word.

"Never!" Though waves of trouble go over your head, and all hope seems taken away. Even then the Word of God will stand.

"Never!" When the cold chill of death is creeping over you, and friends can do no more, and you are starting on that journey from which there is no return. Even then—Christ will not forsake you.

"Never!" When the Day of Judgment comes, and the books are opened, and the dead are rising from their graves, and eternity is beginning. Even then the promise will bear all your weight. Christ will not leave his hold on your soul.
- J. C. Ryle


Thursday, 4 August 2011

Imponderable, Inexpressible

So often we can treat being a Christian a light thing. We need to come back again and again and remind ourselves of what it means to be in Christ. Belonging to Jesus is not something that we can take lightly, it is the highest privelege in the universe. If we are those whom God has brought to repentance and faith in Jesus, then we are more priveleged than we can begin to imagine.
Martin Luther, in a sermon on John 1:12, reminded his hearers of this as he spoke of the incomparable privelege of being sons of God:
No man, no matter who he may be, can ponder the magnificence sufficiently or express it adequately in words. We poor mortals, who are condemned and miserable sinners through our first birth from Adam, are singled out for such great honor and nobility that the eternal and almighty God is our Father and we are His children. Christ is our Brother, and we are His fellow heirs (Rom 8:17). And the dear angels, such as Michael and Gabriel, are not to be our masters but our brothers and servants. . . .
This is a grand and overpowering thought! Whoever really reflects on it–the children of the world will not, but Christians will, although not all of them either–will be so startled and frightened by the thought that he will be prompted to ask: ‘My dear, can this really be possible and true?’
. . . [T]he world rates it a much higher honor and privilege to be the son and heir of a prince, a king, or a count than to be the possessor of God’s spiritual goods, although by comparison all these are nothing but poor bags of worms and their glory sheer stench. Just compare all this with the ineffable dignity and nobility of which the evangelist speaks. . . . If we really believed with all our heart, firmly and unflinchingly, that the eternal God, Creator and Ruler of the world, is our Father, with whom we have an everlasting abode as children and heirs, not of this transitory wicked world but of all God’s imperishable, heavenly, and inexpressible treasures, then we would, indeed, concern ourselves but little with all that the world prizes so highly; much less would we covet it and strive after it.

Indeed, we would regard the world’s riches, treasures, glories, splendor, and might–compared with the dignity and honor due us as the children and heirs, not of a mortal emperor but of the eternal and almighty God–as trifling, paltry, vile, leprous, yes, as stinking filth and poison.
Surely we cannot go away from this truth, and not marvel afresh at the glorious grace of our loving heavenly Father, who has adopted us to be His sons through His Son.

Wednesday, 20 July 2011

Why God's People Are Like a Pair of Underpants

Please do not ever say that the Bible is boring! If you're tempted to say that, can I recommend that you stop reading this post, switch off your computer and read the Bible. The majority of people who moan that the Bible is boring, usually have not read it or given it any serious attention.

I have been struck afresh by the un-boringness of the Bible by beginning to read again through Jeremiah recently. Not only is Scripture overflowing with un-boringness as it sets before us that magnificence of the glory of God, it is also unboring in the way that it communicaties the unboring truths it reveals. Bible authors frequently use humour and vivid illustrations to make their point. Jeremiah 13 is no exception.

In Jeremiah 13 God calls Jeremiah to go and buy a linen loincloth (Jeremiah's equivalent to a pair of underpants), and to put it on (verses 1-2). God then tells Jeremiah to take his new underwear and hide it in a cleft of the rock (verses 3-5). A long time later God commands him to go and dig out his hidden loincloth (verse 6), and when he does so it is ruined and good for nothing (verse 7).

But what is the point of Jeremiah's underpants incident? Why does God call him to buy some underwear, wear it for a while, then hide it away, fully knowing that when he comes back to it days later it will be good for nothing? This is quite an unusual thing for God to command His prophet to do. He goes on to explain in verses 8-11. Jeremiah's underpants incident is in fact a devastating condemnation on God's people. They have refused to listen to God's words, following instead their own heart (which Jeremiah later describes as "decietful above all things" -17:9) which has led them to run after other gods, serving and worshipping them instead of the true and living God (verse 10). Because of this God shall make this rebellious people like Jeremiah's loincloth. Just as his loincloth was spoiled and good for nothing after being left hidden in a cleft for days, so also God shall "spoil the pride of Judah and the great pride of Jerusalem" (verse 9) and make them good for nothing (verse 10). This inusual incident is in the Bible as a condemnation on an idolatrous people. Jeremiah's underpants incident serves to make this truth all the more memorable, his hearers are less likely to forget it.

However, Jeremiah's loincloth has even more to teach us. Not only is it a devastating pronouncement of judgement, the underpants incident also tells us what God's people ought to look like. In verse 11 God says that in a sense God's people are to be like a pair of tight underpants. Just as a loincloth clings to a mans waist, so God made His people cling to Him (verse 11). He made them to be this "that they might be for me a people, a name, a praise, and a glory" (verse 11). He redeemed them and made them His people in order that they might bring glory, honour and praise to Him by clinging tightly to Him.

What does it mean for them to cling tightly to God? Verse 10 gives us a clue. They failed to cling tightly to God by refusing to hear His words, and instead stubbornly following their own hearts. Therefore, if they are to cling to Him, they must cling to His words and not following the decietful desires of their own hearts (17:9). They way God's people keep close to their God is by keeping close to His word.

But there is a problem here. The heart of this problem is the problem of the heart. The heart is naturally decietful (17:9), and refuses to listen and submit to the word of God. Instead it runs after its own decietful desires. God's people will not naturally be like a pair of tight underpants and cling closely to God. Something needs to be done with the heart if God's people are to cling to Him by submitting to His word.

This is exactly what God promises to do later in Jeremiah. He promises a new covenant in which: "...I will put my law within them, and I will write it on their hearts. And I will be their God, and they shall be my people. And no longer shall each one teach his neighbor and each his brother, saying, 'Know the LORD,' for they shall all know me, from the least of them to the greatest, declares the LORD." (31:33-34). He promises new hearts which will listen to God's word and thus cling to Him. Hebrews tells us that it is in Jesus that this is fulfilled (Hebrews 8:8-13; 10:1-18). In Christ we have new hearts that listen in faith to the word of God, and cling tightly to Him by clinging to Christ. In Him we who were dead are made alive (Ephesians 2:1-7).

It is only in Christ that we can be like a pair of tight underpants, clinging closely to God. The way that we continue to cling to Him as we live the Christian life is exactly the way that we begin in the Christian life. We cling to Him by "...hearing with faith" (Galatians 3:2). We began the Christian life by hearing the word of God (at which Christ stands at the centre) with faith, having been given new hearts by God. We continue to cling to God like Jeremiah's loincloth by hearing with faith, by hearing the gospel as revealed in Scripture by faith.

So, may I encourage you to be like a pair of underpants, clinging closely to Jesus, by continuing to listen with faith to the God-breathed Bible (2 Timothy 3:16). It is in Scripture that is completely sufficient to equip us for clinging to Him (2 Timothy 3:16-17), because it is the very word of God (that's what Paul is getting at when he describes it as 'God-breathed). It is here that we hear the voice of the living God. Don't ever say the Bible is boring. It is what will keep us for a lifetime of clinging to God.

Thursday, 7 July 2011

Desiring Worthlessness, Becoming Worthless

"Thus says the LORD:
'What wrong did your fathers find in me that they went far from me, and went after worthlessness, and became worthless?'" (Jeremiah 2:5)


In Jeremiah 2 we read the words that God called Jeremiah to proclaim to Jerusalem (verse 2), revealing the foolishness of their turning from God to idols. It is striking what He says in verse 5 about the effects of their idolatory. He says that they "...went after worthlessness, and became worthless". They set their affections on nothingness, and thus became nothing. They ran after worthless idols,and became worthless themselves.

This is a reminder that we become like what we worship. We are conformed to that which all our affections and desires are centred on. The Psalmist recognised this in Psalm 115. In verses 4-7 he recounts how the idols of the nations are mute, blind, deaf and unfeeling. He then says, "Those who make them become like them; so do all who trust in them." Those who set their affections on these idols become hardened to the true and living God, they become mute, blind, deaf and unfeeling themselves.

Whatever it is that holds our affections, whatever we desire above all, whatever we constantly have at the centre of our thoughts, this will end up shaping us and defining us. Henry Scougal, in his classic little book The Life of God in the Soul of Man, said these words:
Love is that powerful and prevalent passion, by which all the faculties and inclinations of the soul are determined, and on which both its perfection and happiness depend. The worth and excellency of a soul is to be measured by the object of its love. He who loveth mean and sordid things, doth thereby become base and vile; but a noble and well-placed affection, doth advance and improve the spirit into a conformity with the perfections which it loves.

What then is the object of our love? If we recognise the truth of Jeremiah 2:5, surely we cannot stop short of having the eternal God of the Bible, the God and Father of our Lord Jesus Christ, as the one who holds all of our affections, desires and thoughts. He alone is the source of all that is good, therefore if we settle with anything else as the ultimate object of our love we are selling ourselves short. If we do not recognise the surpassing worth of knowing Christ Jesus our Lord (Philippians 3:8), and treasure Him above all things we are short changing ourselves.

We cannot do this ourselves, it must be done for us. Let us pray for transformed hearts that love Jesus undividedly, that hold Him at the centre of our affections. It is only a miracle that can transform our hearts from running after worthlessness, to running after the true and living God.

Wednesday, 30 March 2011

Two Extremely Obvious Observations on the Book of Job

Recently I've been reading through the book of Job and have noticed again two glaringly obvious things about the book as a whole. As obvious as these things are I think that they are part of the way that the book of Job ministers to the suffering believer. So, here they are, two obvious observations on the book of Job:

1) Job is a Big Book
Suffering is not an issue that we can give short and quick answers to as we seek to care for sufferers, or grapple with suffering for ourselves. It takes time to do this. This is perhaps why Job is such a long book. One of the ways it ministers to the suffering believer is by helping them to take time in wrestling with their suffering and the questions it raises. It helps the reader to take the time to grapple with these issues and not to settle with short and quick answers.

2) Job is a Poetic Book
That is, most of the book is made up of poetry. There are very few narrative sections (See Job 1-2; 42), and even these have poetic lines in them. Poetry has an effect that prose never can. It allows us to express things that plain lines of prose would not be able to. It can minister to us in ways that prose cannot. Have you ever noticed how, for many believers, what has sustained them through the waves of suffering has been a Psalm, or a hymn that expresses biblical truth? Poetry has a way of engaging with the soul and ministering to it in ways that plain words cannot (it is interesting to note what a large proportion of the Bible contains poetry and poetic images). Therefore, another way Job ministers to the suffering believer is through the fact that it is a poetic book, it expresses the pain of Job in ways that prose cannot express, but that the suffering believer can identify with. It ministers to the soul with poetic images and devices that express things, and impress things on the heart that cannot be conveyed by other genres. For example, the poetic imagery in chapters 38-41 says "God knows everything and is in control of everything", in ways that are much more vivid than this and in ways that impress these truths on the heart in a way that simple prose cannot.

Friday, 11 February 2011

Sovereignty, Sin and the Cross

The story of Joseph in Genesis 37-50 helps us undersatnd the relation between God's sovereignty (His complete control over all things) and human sin.

Joseph's brothers treated him terribly. They hated him (37:4) and wanted him dead (37:18). They attacked him, threw him down a pit, then sold him to some passing slave traders (37:18-28). It seems that the only thing that kept them from killing him was the opportunity of making money by selling him as a slave (37:26). They then return and lie to their father, telling him that Joseph has been killed by a wild animal. What they do is a horrific evil, and is utterly repulsive in God's eyes.

However, none of this is outside of God's control. Instead, as we work through the story we see exactly the opposite, that God is in complete control, even over their sin. In fact, their sin is part of God's good purposes for His people, which includes Joseph's brothers (who are to go on to be the heads of the tribes of Israel). Joseph's brothers even end up being saved because of their sin. In God's purposes Joseph ends up as the prime minister of Egypt, who is in complete control over rations of food in a time of great famine. This means that he is able to provide food for his family, including his brothers, when they are struck hard by famine. Joseph delivers his family from death, and ensures their security. He would not have been in a position to do this had his brothers not done such a great evil by selling him off for a bit of extra pocket money.

This was not God just making the best of a bad situation, doing the best He could with the mess that Joseph's brothers had made. God ordained their sin to happen as part of His good purposes for His glory and the good of His people. Joseph makes this clear in 50:20 when he says, "you meant evil against me, but God meant it for good, to bring it about that many people should be kept alive, as they are today." On the one hand Joseph's brothers plotted and planned and purposed evil against Joseph. However, all of this was part of God's purposes. He planned this for good, to save His people. God did not make the best of a bad situation, He ordained that this should happen as part of His good purposes. Joseph is not ashamed to hold together both God's utter sovereignty and control over all things and human responsibility, their evil is not excusable.

Not only this but the story also draws attention to the glory of God's grace. In His sovereign purposes, the evil that Joseph's brothers committed end up for their good, and bringing about their deliverance. Does that not make us marvel at God's sovereign grace and His unfathomable wisdom.

If we move to the New Testament we see the same pattern. At the heart of the Bible is the most horrific sin ever committed, the slaughter of the Son of God on the cross. This is a horriffic evil, yet the cross has been planned by God since before the foundation of the world. at the cross both Jew's and Gentiles (representing the whole world) united together against Jesus to put Him to death (Acts 4:27). Yet, they did what God's "hand and...plan had predestined to take place." (Acts 4:28). The most horriffic human sin was planned by God from eternity past for the ultimate good, to bring glory to God by the saving of a people for Himself to all eternity. Not, only this but this horriffic evil was purposed for the inestimable good of those who comitted it. Acts 4 sees the rulers of both Jews and Gentiles as representative of the whole world united in putting Jesus to death. Yet, this great evil has been purposed by God to bring eternal salvation to people from all nations, tribes and tongues, both Jew and Gentile.

Ought this not to lead us to rejoicing in the inestimable riches of God's grace? Does this not make us join with Paul in saying: "Oh, the depth of the riches and wisdom and knowledge of God! How unsearcheable are his judgements and how inscrutable his ways!...To Him be glory forever.Amen" (Romans 11:33, 36).

Tuesday, 14 December 2010

Sufficient

"If God would only do a miracle, then I'd believe." How often do we hear words similar to these from non-Christian friends, family members or contacts? For many people they excuse themselves from taking seriously the truths of the gospel, by saying they need something more to convince them. If only they could see something miraculous, then they'd believe in the gospel. However, such an argument is not convincing.

In Luke 16, Jesus says that if they refuse to listen to the Bible, then even if they see something miraculous they will not be convinced. Jesus is addressing the Pharisees, who were lovers of money (Luke 16:14). In verses 19-31 he gives them a shocking warning in the parable of the rich man and Lazarus. The rich man dies and is in torment in Hades (verse 22-23), upon finding himself in this irreversible torment (verses 25-26) he longs that his brothers be warned so that they might repent before they face the same (verses 27-28). The answer comes back "They have Moses and the prophets [i.e. the Scriptures]; let them hear them." (verse 29). Lazarus insists: "No,...but if someone goes to them fro the dead, they will repent." (verse 30). To which Abraham replies "If they do not hear Moses and the Prophets, neither will they be convinced if someone should rise from the dead." (verse 31).

The Bible is sufficient for belief. We do not need anything else to convince us and to bring us to repentance. J. C. Ryle has these helpful and challenging words to say on this in his 'Expository Thoughts' on Luke:
The Scriptures contain all that we need to know in order to be saved, and a messenger from the world beyond the grave could add nothing to them. It is not more evidence that is wanted in order to make men repent, but more heart and will to make use of what they already know. The dead could tell us nothing more than the Bible contains, it they rose from their graves to instruct us. After the first novelty of their testimony was worn away, we should care no more for their words than the words of any other. This wretched waiting for something which we have not, and neglect of what we have, is the ruin of thousands of souls. Faith, simple faith in the Scriptures which we already posess, is the first thing needful to salvation. The man who has the Bible, and can read it, and yet waits for more evidence before he becomes a decided Christian, is decieving himself. Except he awakens from his delusion he will die in his sins.
Taken from 'Expository Thoughts on Luke'.

Wednesday, 8 December 2010

Rich Abundance

In Luke 14 Jesus uses the image of a banquet to describe the kingdom. The offer of the gospel is an offer to come and feast at a rich and abundant banquet. Here's what J. C. Ryle has to say, commenting on verses 15-24, on why the offer of the gospel is likened to an invitation to a banquet:
The Gospel contains a full supply of everything that sinners need in order to be saved. We are all naturally starving, empty, helpless, and ready to perish. Forgiveness of all sin, and peace with God, - justification of the person, and sanctification of the heart, - grace by the way, and glory in the end, - are the gracious provision which God has prepared for the wants of our souls. There is nothing that sin-laden hearts can wish, or weary consciences require, which is not spread before men in rich abundance in Christ.
Taken from J. C. Ryle's  'Expository Thoughts on Luke'.

Wednesday, 10 November 2010

The Adversity Gospel

We've all heard of the prosperity gospel (which is really no gospel), this is the teaching that if you become a Christian your life in this world will get better. Your bank balance will soar, your car will become faster, your house will get bigger and more comfortable, and life in general will get much easier. But that's not biblical Christianity.

Instead of the prosperity gospel, the Bible teaches the adversity gospel. It teaches us that affliction is God's good gift to his people. This is what the Psalmist of Psalm 119 recognises. In verses 65-72 he spells out why the adversity gospel is such good news. That is, why affliction itself is a good gift of God to his people.

Throughout this section there is an emphasis on the goodness of God. Notice the repeated words that draw attention to this (v. 65, 66, 68, 71, 72). He is delighting in the goodness of God towards him and inviting us to join with him in doing the same.

But how has God been good to him? This is where we get a suprise. God's goodness is shown to him by afflicting him. In v. 65 he affirms "You have dealt well with your servant". Having had this taste of God's goodness he hungers for more, praying "Teach me good judgement and knowledge" (v.66) which only comes from the word of God. This is not just head knowledge, but a whole life transformed by the word of God to walk in the way of the word. But how has he tasted this goodness? He continues in v. 67: "Before I was afflicted I went astray, but now I keep your word." It is precisely by afflicting him that God has been good to him. Affliction is God's good school for teaching his people His word. It is this truth that led Martin Luther to describe suffering as one of the exegetical keys to understanding the Bible. When we are afflicted as Christians, it is God's goodness to us that we might know and live out Scripture more deeply. Therefore, the Psalmist is able to say: "You are good and do good; teach me your statutes" (v. 68). So also, when we are afflicted (whether it be persecution or sickness or any other trouble), we also ought to be able to join with him saying "You are good and do good".

In verses 69-70 the he spells out a little more what his affliction looks like. He is smeared with lies because he delights in the word of God. Notice the contrast in these verses between the Psalmist and his opponents. They (v. 69) smear him with lies, slandering him with all sorts of untruths about him. They have hard hearts (v. 70), hearts that are unfeeling like fat. Their hearts are hardened to the word of God, therefore they oppose those who love the word of God. On the other hand, the Psalmist strives to keep God's word with his whole heart (v.69), an obedience to God's word that comes from a deep delight in it (v. 70). The contrast in these two verses shows us that the more we delight in Scripture, the more we shall be opposed by those whose hearts are hard, and refuse to submit to the word of God.

This does not give the Psalmist cause for despair. No. Rather, it leads him to exactly the opposite. He rejoices. He knows that this is a good thing. He says: "It is good for me that I was afflicted, that I might learn your statutes." (v. 71). The affliction that God has sent his way is a good thing, because it teaches him God's statutes. Look at the result of his sufferings, he is brought to say: "The law of your mouth is better to me than thousands of gold and silver pieces." The more he suffers the more precious the word of God becomes to him. It ought to be the same with us. The more we face affliction and suffering, whatever form they take, the more we are thrown upon the promises of God as our only hope in the midst of a fallen world. When we lose our job for holding to biblical values, when family reject us for becoming a Christian, when the doctor breaks the news to us that it's cancer, when the finances don't stretch - when all of these things come upon us they ought to open our eyes even wider to the all-surpassing preciousness of the word of God, which alone gives life. Affliction does not give us cause for despair, instead it ought to bring us to delight in, and cling to, the word of God.

All this means that when affilction strikes we can fall down on our knees and thank God. As the tears roll down our cheeks, our mouths can be filled with praise. Our suffering, painful as it may be, is a good gift from our Heavenly Father and serves to teach us His word and bring us to an even deeper Bible delight. Surely, as a watching world looks on, this is a testimony like no other to the supremacy and all-sufficiency of Christ, the one who stands at the centre of the word of God, the one in whom all the promises of God find their yes and amen (2 Corinthians 1:20).

Tuesday, 28 September 2010

Pleading for Justice

One of the most helpful pieces of advice on reading the Bible that I have been given is this: 'Always look for the suprises'. That is, always be on the look out for things that you wouldn't expect the author to say or ways you didn't expect him to say it.

One such suprise comes in a very familiar couple of verses. 1 John 1:8-9 says this: "If we say we have no sin, we decieve ourselves, and the truth is not in us. If we confess our sins, he is faithful and just to forgive us our sins and to cleanse us from all unrighteousness."

Did you notice the suprise? If we were writing these verses it is very likely that we would not have said that God is "...faithful and just to forgive us our sins". It's more likely that we would have said something like: 'He is gracious and merciful to forgive us our sins' (which we know from the rest of Scripture is gloriously true). So why then does John say that God is faithful and just to forgive our sins? How does His faithfulness and justice relate to His forgiveness of sins? What difference does it make to our understanding of forgiveness? I want to suggest that it makes a huge difference.
Let's look at both of these ideas individually:

1) God is faithful to forgive us our sins
Why is it that God is faithful to forgive us our sins? He is faithful because He has promised to forgive. He has promised His people "...I will forgive their iniquity, and I will remember their sin no more." (Jeremiah 31:34), and has fulfilled this in Christ (see Hebrews 10:1-18 - especially v 17). He has promised that all those who look to Christ in repentance and faith have their sin forgiven.
This means that we can have great assurance therefore of forgiveness, because of who has promised. God does not lie, nor does He change His mind, therefore what He has promised is sure and certain. He has promised forgiveness of sin to all those who trust in Christ. Therefore, as His people, we have confidence that "If we confess our sins, he is faithful... to forgive us our sins".

2) God is just to forgive us our sins
This is probably the more suprising of the two suprises. In what sense is God just to forgive us our sins? The rest of the context of 1 John helps us to understand this. The answer is found in the work of Jesus. In 2:1-2 we read "...if anyone does sin we have an advocate with the Father, Jesus Christ the righteous. He is the propitiation for our sins...". God had given Jesus to us to be the propitiation for our sins, He is the one who has turned aside God's wrath from us by willingly taking it upon Himself in our place. He is the righteous one who took our unrighteousness upon Himself, taking its consequences on the cross. It is through faith in Him that we are counted as righteous.

This means that Jesus can be our advocate. He stands before the Father in our defence, pleading that He would deal justly with us and forgive us. He can do this because justice has already been done at the cross. Our sin has already been punished at the cross, and God will not punish the same sins twice.

When we do sin, we have the confidence to come before God and plead that He would act justly towards us and forgive us our sin. We have the confidence to do this because of the cross. As His people, the punishment for our sin has been poured out on Jesus in our place , therefore we shall never have to bear it. The hymnwriter Augustus Toplady puts it like this:
If thou hast my discharge procured,
And freely in my room endured
The whole of wrath divine;
Payment God cannot twice demand,
First at my bleeding Surety's hand,
And then again at mine.
God will not punish the same sins twice. If the punishement has already been taken by Christ on the cross, we have complete assurance that we shall never have to bear it.

Surely this brings us great assuance. We can humbly and confidently confess our sin before God and ask for His forgiveness, knowing that He will forgive. John is quite clear that this truth is not an encouragement to sin (1 John 2:1), but it is an encouragement when we do sin. Which we will do (1 John 1:8) until that day when "...we shall be like him, because we shall see him as he is." (1 John 3:2).

When we understand these truths we can go away joyfully singing the final verse of Toplady's hymn:
Turn then, my soul, unto thy rest!
The merits of thy great High Priest
Have bought thy liberty;
Trust in His efficacious blood,
Nor fear thy banishment from God,
Since Jesus died for thee.