What then was it that sustained him through such a devastating loss? He speaks of how he strengthened himself in that time in these words:
What will prepare us for times of great suffering and pain? If we are those who give ourselves to drinking deeply from the Bible and taking God at His word, we will be able to say with George "I am satisfied with God" in the midst of those storms when they come. The more we saturate ourselves in Scripture the more we will see the character of God, and the more we will recognise His goodness and faithfulness. The more we know Him the more we will trust Him and praise Him in times of trouble, because we know that He will not bring anything upon His children that is not for His glory and our good.
Extract taken from: George Mueller, A Narrative of Some of the Lord's Dealing with George Muller, Written by Himself, Jehovah Magnified. Addresses by George Muller Complete and Unabridged, 2 vols. (Muskegon, Mich.: Dust and Ashes, 2003), 2:745.