by threatening him with a cruel and unjust punishment, and when suddenly he turns upon you and says: “Punish me. I do not deserve it. But because I do not deserve it, I will accept it so that the world will know that I am right and you are wrong,” you hardly know what to do. You feel defeated and secretly ashamed. You know that this man is as good a man as you are; that from some mysterious source he has found the courage and the conviction to meet physical force with soul force.
Martin Luther King Jr., Why We Can’t Wait, published 1964.