Who will not mercie unto others show, How can he mercy ever hope to have?

It’s the mercy I can’t take.

Beware of the man who does not return your blow: he neither forgives you nor allows you to forgive yourself

If I can't forgive him, the Lord won’t forgive me.

For the one who does not practice mercy will have his judgment without mercy. Mercy triumphs over judgment.

God may forgive you, but I never can.

That man who has never been in danger cannot answer for his courage.

A man without regrets cannot be cured.

I wonder at a man who loses hope of salvation when the door of repentance is open for him.

Mercy, I have learned, is a thing that is withheld from one whenever he most needs it," he said. "Yet when he is in a position to grant it himself, those who withheld it previously cry out for it."

"When a human kills an animal for food, he is neglecting his own hunger for justice. Man prays for mercy, but is unwilling to extend it to others. Why should man then expect mercy from God? It's unfair to expect something that you are not willing to give. It is inconsistent. I can never accept inconsistency or injustice. Even if it comes from God. If there would come a voice from God saying, "I'm against vegetarianism!" I would say, "Well, I am for it!" This is how strongly I feel in this regard."

You do not beg the sun for mercy.

-Maud'dib's Travail from The Stilgar Commentary

557. The offender never pardons.

Perish, abhorred, the man who never brings himself to unbolt his heart in frankness to some honored friends!