Laudator Temporis Acti

Dio Cassius 78.11.5 (on Caracalla; tr. Earnest Cary):

But this same emperor made many mistakes because of the obstinacy with which he clung to his own opinions; for he wished not only to know everything but to be the only one to know anything, and he desired not only to have all power but to be the only one to have power. Hence he asked no one's advice and was jealous of those who had any useful knowledge. He never loved anyone, but he hated all who excelled in anything, most of all those whom he pretended to love most; and he destroyed many of them in one way or another.

ὅτι ὁ αὐτὸς αὐτογνωμονῶν πολλὰ ἐσφάλη· πάντα τε γὰρ οὐχ ὅτι εἰδέναι ἀλλὰ καὶ μόνος εἰδέναι ἤθελε, καὶ πάντα οὐχ ὅτι δύνασθαι ἀλλὰ καὶ μόνος δύνασθαι ἠβούλετο, καὶ διὰ τοῦτο οὔτε τινὶ συμβούλῳ ἐχρῆτο καὶ τοῖς χρηστόν τι εἰδόσιν ἐφθόνει. ἐφίλησε μὲν γὰρ οὐδένα πώποτε, ἐμίσησε δὲ πάντας τοὺς προφέροντας ἔν τινι, μάλιστα δὲ οὓς μάλιστα ἀγαπᾶν προσεποιεῖτο· καὶ αὐτῶν συχνοὺς καὶ διέφθειρεν τρόπον τινά.