Epictetus, Works, book 3, Περὶ τοῦ μὴ δεῖν προσπάσχειν τοῖσ οὐκ ἐφ’ ἡμῖν. 3:

πρὸσ τοῦτο ἀφορμὰσ ἔδωκεν, τὰ μὲν ἴδια δοὺσ ἑκάστῳ, τὰ δ’ ἀλλότρια· τὰ μὲν κωλυτὰ καὶ ἀφαιρετὰ καὶ ἀναγκαστὰ οὐκ ἴδια, τὰ δ’ ἀκώλυτα ἴδια· τὴν δ’ οὐσίαν τοῦ ἀγαθοῦ καὶ τοῦ κακοῦ, ὥσπερ ἦν ἄξιον τὸν κηδόμενον ἡμῶν καὶ πατρικῶσ προιστάμενον, ἐν τοῖσ ἰδίοισ.