From Garrow's Bearing the Cross:

It was around midnight. . . You can have some strange experiences at midnight. . . [A caller had threatened, saying] "Nigger, we are tired of you and your mess now. If you aren't out of this town in three days, we're going to blow your brains out, and blow up your house." [. . . ]

I prayed a prayer, and I prayed out loud that night. I said, 'Lord, I'm down here trying to do what's right. I think I'm right. I think the cause we represent is right. But Lord, I must confess that I'm weak now. I'm faltering. I'm losing my courage. And I can't let the people see me like this because if they see me weak and losing my courage, they will begin to get weak...And it seemed at that moment that I could hear an inner voice saying to me, 'Martin Luther, stand for righteousness. Stand up for justice. Stand up for truth. And lo I will be with you, even until the end of the world.'. . . I heard the voice of Jesus saying still to fight on. He promised never to leave me, never to leave me alone. No never alone. No never alone. He promised never to leave me, never to leave me alone.