Plato, Laws 643a

οἱ ἡμέτεροι ἔχουσιν γονῆς. τὰ μὲν τοίνυν ὑμέτερα ἀκούειν, ὡς ἔοικεν, ἕτοιμʼ ἂν εἴη· τὰ δʼ ἐμὰ βούλεσθαι μὲν ἕτοιμα, δύνασθαι δὲ οὐ πάνυ ῥᾴδια, ὅμως δὲ πειρατέον. πρῶτον δὴ οὖν πρὸς τὸν λόγον ὁρισώμεθα παιδείαν τί ποτʼ ἐστὶν καὶ τίνα δύναμιν ἔχει· διὰ γὰρ ταύτης φαμὲν ἰτέον εἶναι τὸν προκεχειρισμένον ἐν τῷ νῦν λόγον ὑφʼ ἡμῶν, μέχριπερ ἂν πρὸς τὸν θεὸν ἀφίκηται. πάνυ μὲν οὖν δρῶμεν ταῦτα, εἴπερ σοί γε ἡδύ.

have cherished an affection for Athens. Evidently, then, you are both ready to play your part as listeners. But as for my part, though the will is there, to compass the task is hard: still, I must try. In the first place, then, our argument requires that we should define education and describe its effects: that is the path on which our present discourse must proceed until it finally arrives at the god of Wine. By all means let us do so, since it is your wish.