Albinus of Smyrna, Introduction to Plato’s Dialogues 1

τῶν κυριωτάτων Πλάτωνος δογμάτων τοιαύτη τις ἂν διδασκαλία γένοιτο. φιλοσοφία ἐστὶν ὄρεξις σοφίας, ἢ λύσις καὶ περιαγωγὴ ψυχῆς ἀπὸ σώματος, ἐπὶ τὰ νοητὰ ἡμῶν τρεπομένων καὶ τὰ κατ’ ἀλήθειαν ὄντα. σοφία δ’ ἐστὶν ἐπιστήμη θείων καὶ ἀνθρωπίνων πραγμάτων. φιλόσοφος δ’ ἐστὶν ὁ παρωνύμως ὠνομασμένος ἀπὸ τῆς φιλοσοφίας, ὡς ὁ μουσικὸς ἀπὸ τῆς μουσικῆς.

A rehearsal of the chiefest of Plato’s doctrines would be of the following sort. Philosophy is the striving for wisdom, or the freeing and moving around of the soul separately from the body, as we take ourselves in search of those things which concern the mind and are in accordance with truth. Wisdom is the understanding of divine and human matters. A ‘philosopher’ has a name derived from ‘philosophy’, just as a ‘musician’ takes his name from ‘music’.