The question of why evil exists is not a theological question, for it assumes that it is possible to go behind the existence forced upon us as sinners. If we could answer it then we would not be sinners. We could make something else responsible...The theological question does not arise about the origin of evil but about the real overcoming of evil on the Cross; it ask for the forgiveness of guilt, for the reconciliation of the fallen world

Your life as a Christian should make non believers question their disbelief in God.

Must the Christian go around looking for a cross to bear, seeking to suffer? No, insisted Bonhoeffer. Opportunities for bearing crosses will occur along life's way and all that is required is the willingness to act when the time comes. The needs of the neighbor, especially those of the weak and downtrodden, the victimized and the persecuted, the ill and the lonely, will become abundantly evident.

Judging others makes us blind, whereas love is illuminating.

In the gospels the very first step a man must take is an act which radically affects his whole existence.

Being free means "being free for the other," because the other has bound me to him. Only in relationship with the other am I free

Still more pathetic is the total collapse of moral fanaticism. Fanatics think that their single-minded principles qualify them to do battle with the powers of evil; but like a bull they rush at the red cloak instead of the person who is holding it; he exhausts himself and is beaten. He gets entangled in non-essentials and falls into the trap set by cleverer people.