The retreat into yourself

Book Four contains what is probably the most famous passage in the entire Meditations. "People look for retreats for themselves," Marcus writes, "in the country, by the seaside, in the mountains; and you yourself are wont to long after such retreats. But this is altogether unphilosophical, when it is in your power at any moment you choose to retire into yourself. For nowhere does a man retire with more quiet or more freedom from trouble than into his own soul." It is the inner citadel made fully explicit.

The book develops the image at length. Marcus describes what one does in the retreat: rehearse the basic doctrines, recover one's principles, remind oneself that the cosmos is rational and that one's own ruling part is sovereign. He is concrete about how to use the retreat in moments of distress — when a senator has been rude, when news from the front is bad, when the body aches. The retreat is not an escape; it is a recalibration. You go in, you re-orient, you come out and continue.

Book Four also has some of the sharpest mortality writing. Life is a campaign, Marcus says, and a brief one — a short stay in a foreign land. The river of time bears each thing along, used a while, then gone. His own death, he tells himself, is now near. None of this is melodramatic; he is doing the exercise. By the end of the book the inner retreat and the brevity of life have become two faces of the same discipline. You retire into the citadel; you come out with the brevity refreshed; you act.