Past sins, if you repent of them, whiten you. They made a great psalmist out of David, a faithful believer out of the prostitute Rahab, a zealous apostle out of the persecutor Saul. I have been a loved preacher and writer with a particular vocation. My sermons and books would not have had the same quality without my past of anarchy, vice, and violent atheism.

If Prison Walls Could Speak (1972)