Apply the dichotomy of control to your desires

Before each want, ask: is the object of this desire in my power, or outside it?

Why it works

Epictetus opened the Enchiridion with the dichotomy of control because the misapplication of desire — directing it at externals — is the single most generative source of anxiety, disappointment, and resentment. The practice works by creating a pause between the arising of desire and the endorsement of it, in which the question "is this mine to have?" interrupts automatic craving and redirects wanting toward what is genuinely within reach: one’s own judgment and response.

How to do it

1. When you notice a want, name it explicitly: "I want [X]."
2. Ask: is X entirely in my power, partially, or not at all?
3. If not entirely in your power, ask: what aspect of this situation IS in my power? Redirect desire there.
4. Practice in small cases first (wanting a particular outcome in a conversation) before the large ones (wanting someone’s approval).

Evidence

The dichotomy of control is the philosophical core of Stoicism and a direct ancestor of the acceptance-based strategies in ACT (Acceptance and Commitment Therapy), which have a substantial evidence base for reducing psychological distress. (clinical)

The ACT evidence supports acceptance of what is outside control generally; the Stoic framing adds the specific redirection of desire toward virtue, which is not separately trialed.

Sources

• Hayes, S.C., Strosahl, K.D. & Wilson, K.G. (1999), Acceptance and Commitment Therapy, Guilford Press

Common mistake

Treating "it’s outside my control" as a reason for passivity or resignation, rather than as a redirection toward the domain — one’s own response — where effort is actually effective.