What is Marcus Aurelius's method for analyzing impressions and events?

Marcus does not leave the method vague. He gives a sequence: take whatever is presented to you and make for yourself a definition or description of it, so you see distinctly what kind of thing it is, in its substance, in its nudity, in its complete entirety, and tell yourself its proper name, and the names of the things of which it has been compounded, and into which it will be resolved (Meditations 3.11). That is the core move: strip the impression of the language and emotional coating that usually arrives with it, and describe the bare thing underneath.

The common misreading treats this as a detachment trick, a way to feel less about events by relabeling them in cold, technical terms. That is not what Marcus is after. He says this kind of methodical examination is productive of elevation of mind, because it lets you see the object in relation to the whole universe at once: what use it serves, what it is worth to the whole and to man, who is a citizen of the highest city, of which all other cities are like families (Meditations 3.11). The point is not to feel less. The point is to judge correctly, by seeing the thing in its full context rather than through the story your first reaction tells you.

The method has several layers, and Marcus lists them in order. First, name the thing plainly: what is it, what is it made of, how long does this kind of thing naturally last. Second, place it in the larger order: this comes from God, and this is according to the apportionment and spinning of the thread of destiny (Meditations 3.11). Third, if the impression involves another person, remember the natural law of fellowship: this is from one of the same stock, and a kinsman and partner, one who knows not however what is according to his nature, and respond with benevolence and justice rather than in kind. Fourth, ask what virtue the situation calls for, whether gentleness, manliness, truth, fidelity, simplicity, or contentment. Fifth, for anything that is not itself good or bad, what Stoics call an indifferent, ascertain its actual value rather than the inflated or deflated value your first impression assigned it.

That last step connects to a claim Marcus makes elsewhere: things like death, life, honor, dishonor, pain and pleasure all happen equally to good men and bad, being things which make us neither better nor worse, and therefore they are neither good nor evil (Meditations 2.11, related passage). The method of definition is how you apply that claim in the moment. An insult arrives dressed as an injury. Stripped down, it is sound produced by another person's mouth, an event that cannot by itself make you worse. A diagnosis arrives dressed as catastrophe. Stripped down, it is a change in the condition of a body that will, like all bodies, eventually be resolved into its parts.

What changes for someone who practices this is not that events stop happening or that pain stops hurting. What changes is the gap between the raw impression and your judgment about it. Most distress does not come from things themselves but from the description you silently attach to them before you notice you have done it. Marcus's method inserts a pause: define it, name its parts, place it in the whole, ask what virtue it calls for. That pause is where the faculty of choice, the part of you that is actually up to you, gets to act instead of react.

A concrete way to try this: the next time something provokes you, before reacting, describe it out loud in the plainest possible terms, as if to a stranger who has never heard of the emotional weight it normally carries. Then ask only one further question: what virtue does this moment call for. That is the whole method, run once.