Plato, Symposium 206a · 206a

Diotima — ἐρῶσιν ἅνθρωποι ἢ τοῦ ἀγαθοῦ. ἢ σοὶ δοκοῦσιν;
Socrates — μὰ Δίʼ οὐκ ἔμοιγε, ἦν δʼ ἐγώ.
Diotima — ἆρʼ οὖν, ἦ δʼ ἥ, οὕτως ἁπλοῦν ἐστι λέγειν ὅτι οἱ ἄνθρωποι τἀγαθοῦ ἐρῶσιν;
Socrates — ναί, ἔφην.
Diotima — τί δέ; οὐ προσθετέον, ἔφη, ὅτι καὶ εἶναι τὸ ἀγαθὸν αὑτοῖς ἐρῶσιν;
Socrates — προσθετέον.
Diotima — ἆρʼ οὖν, ἔφη, καὶ οὐ μόνον εἶναι, ἀλλὰ καὶ ἀεὶ εἶναι;
Socrates — καὶ τοῦτο προσθετέον.
Diotima — ἔστιν ἄρα συλλήβδην, ἔφη, ὁ ἔρως τοῦ τὸ ἀγαθὸν αὑτῷ εἶναι ἀεί.
Socrates — ἀληθέστατα, ἔφην ἐγώ, λέγεις.

do people love than the good. Or do they seem so to you? By Zeus, not to me, said I. Is it, then, so simple to say, said she, that people love the good? Yes, I said. What then? Must we not add, she said, that they love also the good to be theirs? It must be added. And not only to be, but also always to be? This too must be added. Love is, then, in sum, of the good being one's own forever. Most truly, I said, you speak.