Near the end of his life an emperor borrowed a line from the theater

Near the very end of his notebook, after two decades of plague, war, and the deaths of people close to him, Marcus Aurelius reaches for a comparison from the theatre to explain what he has decided about his own eventual end. Mortal man, he writes to himself, you have lived as a citizen in this great city. What matter if that life is five years or fifty? The laws of the city apply equally to all. This is no tyrant or corrupt judge who dismisses you, but the very same nature that brought you in. It is like the officer who engaged a comic actor dismissing him from the stage. But I have not played my five acts, only three, the actor objects. True, comes the answer, but in life three acts can be the whole play.

He had reasons to need this comparison more than most people ever do. The plague that returned with Lucius Verus's armies from the east kept killing for years after it reached Rome. His own general, Avidius Cassius, once declared him dead and tried to seize the throne while he was still very much alive on campaign. His mother, he notes elsewhere with quiet gratitude, was fated to die young but still lived out her last years with him. Death, in other words, was not an abstraction Marcus theorised about from safety. It kept arriving at his door in specific, named forms.

His response, worked out across many entries, was to treat death as one more transformation nature performs, exactly like the ones that already happen constantly inside a living body: the death of one element becomes the birth of another, as he borrows from the philosopher Heraclitus, the death of earth is the birth of water, the death of water the birth of air. Elsewhere he compares dying directly to being born, calling both a mystery of nature, first a combination, then a dissolution, of the same elements, certainly no cause for shame. He even quotes an old line about leaves scattered by the wind, replaced each spring by new ones the forest puts out in their place, and applies it to entire generations of people, including whoever will one day mourn him.

What this buys him is not comfort in the ordinary sense, but a specific kind of freedom: since a shorter life is not an unfinished one, provided it was well acted while it lasted, there is no reason to keep postponing the acting well until some imagined fourth act arrives.

Take one thing you have been quietly postponing until later, a difficult conversation, a change you know you want, and ask what would happen if you treated today as though it might be your final act rather than a rehearsal for some future one. Practice describing death, at least once, in the plain terms Marcus Aurelius used, a dissolution of elements rather than an ending of everything you were, and notice whether the fear around it shifts at all. When someone close to you dies, let the grief run its course, but watch for the extra layer your mind wants to add, the judgement that this was a cosmic wrong rather than a natural change. Ask yourself, right now, whether the character you are currently playing is one you would be content to leave the stage as.