Most people think Stoic practice is about steeling yourself against difficulty — a kind of philosophical armor. But Chrysippus, the third head of the Stoa whose ideas underpin most of what we call Stoicism, had a more physiological insight: he located the commanding faculty of the mind — the *hegemonikon* — in the chest, not the brain, because he understood thought and body as a single integrated system, not two separate things. That's not primitive anatomy. It's a reminder that your reasoning doesn't happen in a vacuum suspended above your body; it happens in a body that's slept or hasn't, eaten well or poorly, moved or sat frozen for six hours. A Stoic practice built only on journal prompts and maxims, with no attention to the body generating your impressions in the first place, is working with one hand tied behind its back. Today, before you try to think your way through anything hard, ask what your body is already telling you.

What physical state were you in the last time you made a decision you later regretted — and did you notice it at the time?

Drawing from Stoicism — Chrysippus of Soli