Plato, Symposium 201e · 201e

Socrates — αὐτὸν πρῶτον, τίς ἐστιν ὁ Ἔρως καὶ ποῖός τις, ἔπειτα τὰ ἔργα αὐτοῦ. δοκεῖ οὖν μοι ῥᾷστον εἶναι οὕτω διελθεῖν, ὥς ποτέ με ἡ ξένη ἀνακρίνουσα διῄει. σχεδὸν γάρ τι καὶ ἐγὼ πρὸς αὐτὴν ἕτερα τοιαῦτα ἔλεγον οἷάπερ νῦν πρὸς ἐμὲ Ἀγάθων, ὡς εἴη ὁ Ἔρως μέγας θεός, εἴη δὲ τῶν καλῶν· ἤλεγχε δή με τούτοις τοῖς λόγοις οἷσπερ ἐγὼ τοῦτον, ὡς οὔτε καλὸς εἴη κατὰ τὸν ἐμὸν λόγον οὔτε ἀγαθός. καὶ ἐγώ, πῶς λέγεις, ἔφην, ὦ Διοτίμα; αἰσχρὸς ἄρα ὁ Ἔρως ἐστὶ καὶ κακός;
Diotima — καὶ ἥ, οὐκ εὐφημήσεις; ἔφη· ἢ οἴει, ὅτι ἂν μὴ καλὸν ᾖ, ἀναγκαῖον αὐτὸ εἶναι αἰσχρόν;

first, what Eros is and of what sort, then his works. It seems to me easiest to go through it thus, as once the foreign woman, questioning me, went through it. For I too, nearly, was saying to her other such things just as Agathon now to me: that Eros was a great god, and was of the beautiful; and she refuted me with these very arguments by which I refuted him, that he was neither beautiful by my own argument nor good. And I said: how do you mean, Diotima? Is Eros then ugly and bad? And she: won't you hush? she said. Or do you think that whatever is not beautiful must necessarily be ugly?