Philo, The Special laws 3.25, 138-140 (Full Greek text on the Scaife Viewer)
“Someone who has walled up his own home and shares his freedom of speech with no one inside, but acts savagely towards everyone because of his intrinsic or acquired hatred of other people, is a tyrant with meager resources. He proves by these actions that he will not remain where he is should he obtain more wealth. He will turn against cities, countries, and nations after he enslaves his own country—he provides a sign that he will not treat other subjects kindly in the future.
ὁ γὰρ τὴν μὲν ἰδίαν οἰκίαν ὥσπερ ἄκραν ἐπιτειχίσας, παρρησίας δὲ τῶν ἔνδον μηδενὶ μεταδιδούς, ἀλλὰ πρὸς ἅπαντας ἠγριωμένος ὑπὸ τῆς ἐμ̇φύτου τάχα δὲ καὶ ἐπιτετηδευμένης μισανθρωπίας, τύραννός ἐστιν ἐλάττοσι παρασκευαῖς χρώμενος. ἐξ ὧν διελέγχεται μὴ στησόμενος ἐπὶ τῶν αὐτῶν, εἰ μειζόνων λάβοιτο χρημάτων· διαβήσεται γὰρ εὐθὺς ἐπὶ πόλεις τε καὶ χώρας καὶ ἔθνη τὴν αὑτοῦ πατρίδα προδουλωσάμενος εἰς ἔνδειξιν τοῦ μηδενὶ μέλλειν τῶν ἄλλων ὑπηκόων ἡμέρως προσφέρεσθαι.
Aristotle, Problems 917a 8.5
“Why do people think that the philosopher is better than the orator? Is it because one explains what injustice is and the other declares that someone is unjust and that one claims someone is a tyrant while the other defines what tyranny is?”
Διὰ τί τὸν φιλόσοφον τοῦ ῥήτορος οἴονται διαφέρειν; ἢ ὅτι ὁ μὲν τί ἐστιν ἀδικία, ὁ δὲ ὡς ἄδικος ὁ δεῖνα, καὶ ὁ μὲν | ὅτι τύραννος, ὁ δὲ οἷον ἡ τυραννίς;