Marcus Aurelius
Meditations 10.30
When thou art offended at any man's fault, forthwith turn to thyself and reflect in what like manner thou dost err thyself; for example, in thinking that money is a good thing, or pleasure, or a bit of reputation, and the like. For by attending to this thou wilt quickly forget thy anger, if this consideration also is added, that the man is compelled: for what else could he do? or, if thou art able, take away from him the compulsion.
Marcus Aurelius, Meditations 10.30, translated by George Long
Does another's wrong-doing shock thee? Turn incontinently to thyself and bethink thee what analogous wrong-doing there is of thine own, such as deeming money to be a good or pleasure or a little cheap fame and the like. For by marking this thou wilt quickly forget thy wrath, with this reflection too to aid thee, that a man is under constraint; for what should he do? Or, if thou art able, remove the constraint.
Marcus Aurelius, Meditations 10.30, translated by C. R. Haines