Of things some are in our power, and others are not.

This line is the opening sentence of Epictetus's *Enchiridion*, the condensed handbook of his teachings, and the phrasing quoted matches the George Long translation word for word ("Of things some are in our power, and others are not"). Checking the Greek original ("Τῶν ὄντων τὰ μέν ἐστιν ἐφ' ἡμῖν, τὰ δὲ οὐκ ἐφ' ἡμῖν") and the other standard English renderings — Elizabeth Carter's 1758 version and the more modern "Some things are up to us and some are not" — confirms they are all translating the same primary passage that opens Chapter 1. The one genuine nuance is that Epictetus wrote nothing himself; his pupil Arrian compiled both the *Discourses* and the *Enchiridion* from his teaching, much as Plato recorded Socrates, but scholarly consensus treats this text as the authoritative primary source for Epictetus's words, and there is no competing thinker to whom the line is credited. This is the foundational statement of his dichotomy of control, one of the most cited passages in all of Stoicism, and it traces cleanly to a specific, identifiable text and chapter. Nothing in the research points to an earlier origin or a rival author, so the attribution stands firmly on a primary source.