From the Reformation 21 Blog:
In one of his two sermons on Ecclesiastes 9:10 (about doing things with all your might), Charles Spurgeon refers to the imprisonment of John Bunyan, and to Bunyan's undying commitment to preach the gospel, regardless of persecution. Here is what Bunyan said to his judge: "If I lie in prison until the moss grows on my eyelids, I will never make a promise to withhold from preaching. . . . If you will let me out of prison to-day, I will preach again to-morrow, by the help of God."