Enchiridion · §1

Τῶν ὄντων τὰ μέν ἐστιν ἐφ᾽ ἡμῖν, τὰ δὲ οὐκ ἐφ᾽ ἡμῖν. ἐφ᾽ ἡμῖν μὲν ὑπόληψις, ὁρμή, ὄρεξις, ἔκκλισις, καὶ ἑνὶ λόγῳ ὅσα ἡμέτερα ἔργα· οὐκ ἐφ᾽ ἡμῖν δὲ τὸ σῶμα, ἡ κτῆσις, δόξαι, ἀρχαί, καὶ ἑνὶ λόγῳ ὅσα οὐχ ἡμέτερα ἔργα.καὶ τὰ μὲν ἐφ᾽ ἡμῖν ἐστι φύσει ἐλεύθερα, ἀκώλυτα, ἀπαραπόδιστα· τὰ δὲ οὐκ ἐφ᾽ ἡμῖν ἀσθενῆ, δοῦλα, κωλυτά, ἀλλότρια.μέμνησο οὖν, ὅτι ἐὰν τὰ φύσει δοῦλα ἐλεύθερα οἴῃ καὶ τὰ ἀλλότρια ἴδια, ἐμποδισθήσῃ, πενθήσεις, ταραχθήσῃ, μέμψῃ καὶ θεοὺς καὶ ἀνθρώπους· ἐὰν δὲ τὸ σὸν μόνον οἴῃ σόν, τὸ δὲ ἀλλότριον, ὥσπερ ἐστίν, ἀλλότριον, οὐδείς σε ἀναγκάσει οὐδέποτε, οὐδείς σε κωλύσει, οὐ μέμψῃ οὐδένα, οὐκ ἐγκαλέσεις τινί, ἄκων πράξεις οὐδὲν ἕν, οὐδείς σε βλάψει, ἐχθρὸν οὐχ ἕξεις, οὐδὲ γὰρ βλαβερόν τι πείσῃ.

Tōn ontōn ta men estin eph' hēmin, ta de ouk eph' hēmin. eph' hēmin men hupolēpsis, hormē, orexis, ekklisis, kai heni logō hosa hēmetera erga; ouk eph' hēmin de to sōma, hē ktēsis, doxai, archai, kai heni logō hosa ouch hēmetera erga. kai ta men eph' hēmin esti phusei eleuthera, akōluta, aparapodista; ta de ouk eph' hēmin asthenē, doula, kōluta, allotria. memnēso oun, hoti ean ta phusei doula eleuthera oiē kai ta allotria idia, empodisthēsē, penthēseis, tarachthēsē, mempsē kai theous kai anthrōpous; ean de to son monon oiē son, to de allotrion, hōsper estin, allotrion, oudeis se anankase oudepote, oudeis se kōlusei.

Some things are in our power, and some are not. In our power are our opinions, impulses, desires, and aversions — in short, whatever is our own doing. Not in our power are our body, our reputation, office, and in a word, whatever is not our own doing. The things in our power are by nature free, unhindered, and unobstructed; those not in our power are weak, slavish, subject to hindrance, and not our own.

— Enchiridion 1

Source: Greek (Schenkl/Oldfather critical edition tradition) + Long 1877 English translation