Two principles we should always have ready — that there is nothing good or evil save in the will; and that we are not to lead events, but to follow them.
δύο γὰρ ταῦτα πρόχειρα ἔχειν δεῖ· ὅτι ἔξω τῆς προαιρέσεως οὐδέν ἐστιν οὔτε ἀγαθὸν οὔτε κακὸν καὶ ὅτι οὐ δεῖ προηγεῖσθαι τῶν πραγμάτων, ἀλλ᾿ ἐπακολουθεῖν.
Original text (Ancient Greek)