Conflict with someone
After an argument
There was a row, or there is one coming, or there is somebody you are not speaking to. What was said is still in the room. You have been over it enough to know you were right, and that has not made it stop.
Marcus wrote about anger often, and nearly always about his own. The passages below are not about who was right. They are about what the anger is doing, and about the one thing that is still yours while it does it.
Marcus Aurelius
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.
Before anything else, he asks what the other person thought they were doing. Nobody does wrong on purpose as wrong: they do it because they think something is good, whether money or standing or being left alone. See the belief and the act stops being a mystery. Then either you share the belief, in which case pardon is owed, or you do not, in which case pity is easier than fury. Either way the anger has less to stand on.
Marcus Aurelius
The best way of avenging thyself is not to become like the wrong doer.
Fourteen words. The temptation after a wrong is to match it, and he says the matching is the loss. Whatever the other person did, becoming like them is the one outcome entirely in your hands, and the only one worth calling revenge.
Marcus Aurelius
When thou hast been compelled by circumstances to be disturbed in a manner, quickly return to thyself and do not continue out of tune longer than the compulsion lasts; for thou wilt have more mastery over the harmony by continually recurring to it.
And he allows for the fact that you were disturbed. Circumstances can compel it. What he asks is that the disturbance not outlast its cause, and that you return to yourself as soon as it has passed, because every return makes the next one easier.
One question
What did the other person believe was good, such that what they did seemed right to them?
Meditations is quoted from George Long's translation of 1862, which is in the public domain. The passages are chosen by hand, shown as written, and never paraphrased.