At once, then, to every harsh impression practice saying: "You are an impression, and not at all the thing you appear to be." Then examine it and test it by the rules you have — and first and above all by this one: whether it concerns the things that are up to us or the things not up to us. And if it concerns one of the things not up to us, have ready to hand: "It is nothing to me."

Here is the one exercise that makes everything before it usable. The Stoic word is φαντασία, an "impression" — not the raw event but the picture of it that arrives in the mind already carrying a verdict: this is terrible, I must have that, this is an outrage. Epictetus's instruction is to catch it at the door and speak to it before you believe it: you are only an impression, not the thing you claim to be. That tiny pause, inserted between the impression and your assent to it, is the whole of Stoic freedom in miniature — it is where the one faculty that is yours actually operates. Then comes the test, and it is the Handbook folding back on its own first sentence. Hold the impression up to the single question of chapter 1: is this about something up to me, or not? If not, the answer is already written — "it is nothing to me," οὐδὲν πρὸς ἐμέ — not because the thing is unreal, but because it lies outside the only territory you govern. The famous opening was the map; this is the drill that lets you walk it, impression by impression, for the rest of your life.