Plato, Symposium 204d · 204d

Diotima — τοῦτο δὴ μετὰ ταῦτʼ, ἔφη, ὦ Σώκρατες, πειράσομαί σε διδάξαι. ἔστι μὲν γὰρ δὴ τοιοῦτος καὶ οὕτω γεγονὼς ὁ Ἔρως, ἔστι δὲ τῶν καλῶν, ὡς σὺ φῄς. εἰ δέ τις ἡμᾶς ἔροιτο· τί τῶν καλῶν ἐστιν ὁ Ἔρως, ὦ Σώκρατές τε καὶ Διοτίμα; ὧδε δὲ σαφέστερον· ἐρᾷ ὁ ἐρῶν τῶν καλῶν· τί ἐρᾷ;
Socrates — καὶ ἐγὼ εἶπον ὅτι γενέσθαι αὑτῷ.
Diotima — ἀλλʼ ἔτι ποθεῖ, ἔφη, ἡ ἀπόκρισις ἐρώτησιν τοιάνδε· τί ἔσται ἐκείνῳ ᾧ ἂν γένηται τὰ καλά;
Socrates — οὐ πάνυ ἔφην ἔτι ἔχειν ἐγὼ πρὸς ταύτην τὴν ἐρώτησιν προχείρως ἀποκρίνασθαι.

This, then, next, Socrates, she said, I will try to teach you. For Eros is such and so begotten, and is of beautiful things, as you say. But if someone should ask us: what, of beautiful things, is Eros, Socrates and Diotima? Or, more clearly, thus: the lover loves beautiful things; what does he love? And I said that they become his own. But the answer still longs for a question such as this: what will there be for him to whom the beautiful become? Not quite yet, I said, can I answer this question offhand.