I read of a minister travelling in the South who obtained permission to preach in the local jail. A son of his host went with him. On the way back, the young man, who was not a Christian, said to the minister— "I hope some of the convicts were impressed. Such a sermon as that ought to do them good."
"Did it do you good?" the minister asked.
"Oh, you were preaching to the convicts!" the young man answered.
The minister shook his head, and said, "I preached Christ, and you need Him as much as they."
D. L. Moody (Anecdotes, Incidents and Illustrations)