This is what Charles Spurgeon had to say about the importance of preaching:
I do not look for any other means of converting men beyond the simple preaching of the gospel and the opening of men's ears to hear it. The moment the
Church of God shall despise the pulpit, God will despise her. It has been through the ministry [i.e. the public preaching of the gospel] that the Lord has always been pleased to revive and bless His Churches.