Shall I show you the sinews of a philosopher? "What sinews are those?" — A will undisappointed; evils avoided; powers daily exercised, careful resolutions; unerring decisions.
δείξω ὑμῖν νεῦρα φιλοσόφου. ποῖα νεῦρα; ὄρεξιν ἀναπότευκτον, ἔκκλισιν ἀπερίπτωτον, ὁρμὴν καθήκουσαν, πρόθεσιν ἐπιμελῆ, συγκατάθεσιν ἀπρόπτωτον.
Original text (Ancient Greek)