Plato, Laws 837d

τοῦ ἐρωμένου βούλοιτʼ ἄν· ὁ δὲ μειχθεὶς ἐξ ἀμφοῖν τρίτος ἔρως οὗτός ἐσθʼ ὃν νῦν διεληλύθαμεν ὡς τρίτον. ὄντων δὲ τούτων τοσούτων, πότερον ἅπαντας δεῖ κωλύειν τὸν νόμον, ἀπείργοντα μὴ γίγνεσθαι ἐν ἡμῖν, ἢ δῆλον ὅτι τὸν μὲν ἀρετῆς ὄντα καὶ τὸν νέον ἐπιθυμοῦντα ὡς ἄριστον γίγνεσθαι βουλοίμεθʼ ἂν ἡμῖν ἐν τῇ πόλει ἐνεῖναι, τοὺς δὲ δύο, εἰ δυνατὸν εἴη, κωλύοιμεν ἄν; ἢ πῶς λέγομεν, ὦ φίλε Μέγιλλε; πάντῃ τοι καλῶς, ὦ ξένε, περὶ αὐτῶν τούτων

the chaste object of his love. But the love which is blended of these two kinds is that which we have described just now as third. Since, then, love has so many varieties, ought the law to prohibit them all and prevent them from existing in our midst, or shall we not plainly wish that the kind of love which belongs to virtue and desires the young to be as good as possible should exist within our State, while we shall prohibit, if possible, the other two kinds? Or what is our view, my dear Megillus? Your description of the subject,