Note 168 — Chapter XIII · DAILY DUTIES.
Reading edition
ἐπιγίγνεσθαι [τῷ προκόπτοντι] τὴν εὐδαιμονίαν ὅταν αἱ μέσαι πράξεις αὗται προσλάβωσι τὸ βέβαιον καὶ ἑκτικὸν καὶ ἰδίαν πῆξίν τινα λάβωσι Stob. as above; ‘illud, quod ultimum venit, ut fidem tibi habeas et recta ire te via credas’ Sen. Dial. ix 2, 2. Epictetus uses the technical term ἀμεταπτωσία ‘unchangeable firmness of mind’ Disc. iii 2, 8.