God sometimes has strange and wonderful preachers. Luke the doctor tells us in his Gospel that a criminal soon to die gave a tremendously impressive sermon from the cross on which he hung. And the Old Testament can tell us that even a real four-legged donkey once preached.
Some people don’t believe these stories. I believe them; for I know that God often chooses wondrous preachers of his truth.
Among these I am particularly impressed by a great, dead, burnt out building. Every time I pass by it, this house begins to preach me a sermon. And I know that it once preached for a whole night to many hundreds of people.