Plato, Laws 797d

ἦ τὸ ψέγεσθαι τὴν ἀρχαιότητα λέγεις ἐν ταῖς πόλεσιν; πάνυ μὲν οὖν. οὐ φαύλους τοίνυν ἡμᾶς ἂν ἀκροατὰς πρὸς αὐτὸν τὸν λόγον ἔχοις ἂν τοῦτον, ἀλλʼ ὡς δυνατὸν εὐμενεστάτους. εἰκὸς γοῦν. λέγε μόνον. ἴτε δή, μειζόνως αὐτὸν ἀκούσωμέν τε ἡμῶν αὐτῶν καὶ πρὸς ἀλλήλους οὕτως εἴπωμεν. μεταβολὴν γὰρ δὴ πάντων πλὴν κακῶν πολὺ σφαλερώτατον εὑρήσομεν ἐν ὥραις πάσαις, ἐν πνεύμασιν, ἐν διαίταις σωμάτων, ἐν τρόποις

Do you mean the way people rail at antiquity in States? Precisely. That is a theme on which you will find us no grudging listeners, but the most sympathetic possible. I should certainly expect it to be so. Only say on. Come now, let us listen to one another and address one another on this subject with greater care than ever. Nothing, as we shall find, is more perilous than change in respect of everything, save only what is bad,—in respect of seasons, winds, bodily diet, mental disposition, everything in short with the solitary exception, as I said just now, of the bad.