Good and Ill

When anyone offends against you, let your first thought be, Under what conception of good and ill was this committed? Once you know that, astonishment and anger will give place to pity. For either your own ideas of what is good are no more advanced than his, or at least bear some likeness to them, in which case it is clearly your duty to pardon him; or else, on the other hand, you have grown beyond supposing such actions to be good or bad, and therefore it will be so much the easier to be tolerant of another's blindness.

Marcus Aurelius trans. Maxwell Staniforth