Plato, Laws 639a

οὐκ ἀποκνητέον ἀκούειν. σκεψώμεθα δή πῃ τῇδε. φέρε, εἴ τις αἰγῶν τροφήν, καὶ τὸ ζῷον αὐτὸ κτῆμα ὡς ἔστιν καλόν, ἐπαινοῖ, ἄλλος δέ τις ἑωρακὼς αἶγας χωρὶς νεμομένας αἰπόλου ἐν ἐργασίμοις χωρίοις δρώσας κακὰ διαψέγοι, καὶ πᾶν θρέμμα ἄναρχον ἢ μετὰ κακῶν ἀρχόντων ἰδὼν οὕτω μέμφοιτο, τὸν τοῦ τοιούτου ψόγον ἡγούμεθα ὑγιὲς ἄν ποτε ψέξαι καὶ ὁτιοῦν; καὶ πῶς; χρηστὸς δὲ ἄρχων ἔσθʼ ἡμῖν ἐν πλοίοις πότερον ἐὰν

we are bound to give it a ready hearing. Let us adopt some such method as this. Suppose that a man were to praise the rearing of goats, and the goat itself as a fine thing to own, and suppose also that another man, who had seen goats grazing without a herd and doing damage on cultivated land, were to run them down, and find fault equally with every animal he saw that was without a master or under a bad master,—would such a man’s censure, about any object whatsoever, be of the smallest value? Certainly not.