Enchiridion · §12

εἰ θέλεις προκόπτειν, ἄφες τοὺς τοιούτους λογισμούς· "ἐὰν ἀμελήσω τῶν ἐμῶν, οὐχ ἕξω τὰ ἐπιτήδεια"· κρεῖσσον γὰρ λιμῷ ἀποθανεῖν ἀλυπήτως καὶ ἀφόβως ἢ ζῆν ἐν ἀφθονίᾳ ταρασσόμενον.ἄρξαι τοιγαροῦν ἀπὸ τῶν σμικρῶν. ἐκχεῖται τὸ ἐλαιάριον, κλέπτεται τὸ οἰνάριον· ἐπίλεγε ὅτι "τοσούτου πωλεῖται ἀπάθεια, τοσούτου ἀταραξία"· οὐδὲν δ᾽ ἀπρίατον λαμβάνεται.

ei theleis prokoptein, aphes tous toioutous logismous; 'ean amelēsō tōn emōn, ouch hexō ta epitēdeia'; kreisson gar limō apothanein alupētōs kai aphobōs ē zēn en aphthonia tarassomenon. arxai toigaroun apo tōn smikrōn. ekcheitai to elaiarion, kleptetai to oinarion; epilege hoti 'tosoutou pōleitai apatheia, tosoutou ataraxia'.

If you wish to make progress, abandon the reasoning that says: 'If I neglect my affairs I will have nothing to live on.' It is better to die of hunger, free from distress and fear, than to live in abundance while inwardly troubled. Begin with small things: when your oil is spilled, when your wine is stolen, tell yourself — 'This is the price of apatheia; this is what ataraxia costs.' Nothing is obtained for free.

— Enchiridion 12

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