[10,31] μόνον γοῦν αὐτὸν λῦσαι τὸ αἴνιγμα τῆς Σφιγγός. καὶ ὁ Διογένης γελάσας, Μὴ γάρ, ἔφη, ἐκεῖνος ἔλυσε τὸ αἴνιγμα; οὐκ ἀκήκοας ὅτι ἄνθρωπον αὐτὸν ἐκέλευσε γνῶναι ἡ Σφίγξ; ὁ δὲ ἄνθρωπον μὲν ὅ ἐστιν οὔτε εἶπεν οὔτε ἔγνω· τὸ δὲ ὄνομα τὸ τοῦ ἀνθρώπου λέγων ᾤετο λέγειν τὸ ἐρωτώμενον· ὥσπερ εἴ τις ἐρωτηθεὶς τί ἐστι Σωκράτης, ὁ δὲ μηδὲν εἴποι πλέον τοῦ ὀνόματος, ὅτι Σωκράτης. ἐγὼ δὲ ἤκουσά του λέγοντος ὅτι ἡ Σφὶγξ ἡ ἀμαθία ἐστίν. ταύτην οὖν καὶ πρότερον διαφθεῖραι τοὺς Βοιωτοὺς καὶ νῦν, οὐδὲν αὐτοὺς ἐῶσαν εἰδέναι, ἅτε ἀνθρώπων ἀμαθεστάτους. τοὺς μὲν οὖν ἄλλους μᾶλλόν τι αἰσθάνεσθαι τῆς αὑτῶν ἀνοίας, τὸν δὲ Οἰδίποδα, σοφώτατον ἡγησάμενον αὑτὸν εἶναι καὶ διαπεφευγέναι τὴν Σφίγγα καὶ πείσαντα τοὺς ἄλλους Θηβαίους τοῦτο, κάκιστα ἀπολέσθαι. ὅσοι γὰρ ἂν ἀμαθεῖς ὄντες πεισθῶσι σοφοὶ εἶναι, οὗτοι πολύ εἰσιν ἀθλιώτεροι τῶν ἄλλων ἁπάντων· καὶ ἔστι τοιοῦτον τὸ τῶν σοφιστῶν γένος.

[10,31] At any rate they say that he alone solved the Sphinx's riddle." At this Diogenes broke into a laugh and said, " He solve the Sphinx's riddle ! Have you not heard that the Sphinx prompted him to give the answer `man' ? As to the meaning of `man,' however, he neither expressed himself nor knew, but when he said the word `man' he thought he was answering the question. It was just as if one were asked, ` What is Socrates ? ' and should give no other answer than the word `Socrates.' I have heard someone say that the Sphinx stands for stupidity ; that this, accordingly, proved the ruin of the Boeotians in the past just as it does now, their stupidity preventing their knowing anything, such utter dullards they are ; and that while the others had an inkling of their ignorance, Oedipus, who thought that he was very wise and had escaped the Sphinx, and who had made the other Thebans believe all this, perished most miserably. For any man who in spite of his ignorance deludes himself with the belief that he is wise is in a much sorrier plight than anyone else. And such is the tribe of sophists."