"I believe that God can and will bring good out of evil, even out of the greatest evil. For that purpose he needs men who make the best use of everything. I believe that God will give us all the strength we need to help us to resist in all times of distress. But he never gives it in advance, lest we should rely on ourselves and not on him alone. A faith such as this should allay all our fears for the future. I believe that even our mistakes and shortcomings are turned to good account, and that it is no harder for God to deal with them than with our supposedly good deeds. I believe that God is no timeless fate, but that he waits for and answers sincere prayers and responsible actions."
Dietrich Bonhoeffer in a letter written the day after the failed assassination attempt on Hitler's life. From Letters and Papers from Prison.