Meditations 7.26

When a man has done thee any wrong, immediately consider with what opinion about good or evil he has done wrong. For when thou hast seen this, thou wilt pity him, and wilt neither wonder nor be angry. For either thou thyself thinkest the same thing to be good that he does, or another thing of the same kind. It is thy duty then to pardon him. But if thou dost not think such things to be good or evil, thou wilt more readily be well disposed to him who is in error.

Marcus Aurelius, Meditations 7.26, translated by George Long

Does a man do thee wrong? Go to and mark what notion of good and evil was his that did the wrong. Once perceive that and thou wilt feel compassion not surprise or anger. For thou hast still thyself either the same notion of good and evil as he or another not unlike. Thou needs must forgive him then. But if thy notions of good and evil are no longer such, all the more easily shalt thou be gracious to him that sees awry.

Marcus Aurelius, Meditations 7.26, translated by C. R. Haines