Plato, Laws 891b

καὶ μάλα γε, ὦ Μέγιλλε, ποιητέον τε ὡς λέγει. καὶ γὰρ εἰ μὴ κατεσπαρμένοι ἦσαν οἱ τοιοῦτοι λόγοι ἐν τοῖς πᾶσιν ὡς ἔπος εἰπεῖν ἀνθρώποις, οὐδὲν ἂν ἔδει τῶν ἐπαμυνούντων λόγων ὡς εἰσὶν θεοί· νῦν δὲ ἀνάγκη. νόμοις οὖν διαφθειρομένοις τοῖς μεγίστοις ὑπὸ κακῶν ἀνθρώπων τίνα καὶ μᾶλλον προσήκει βοηθεῖν ἢ νομοθέτην; οὐκ ἔστιν. ἀλλὰ δὴ λέγε μοι πάλιν, Κλεινία, καὶ σύ—κοινωνὸν

Most certainly it is, Megillus; and we must do as he says. For if the assertions mentioned had not been sown broadcast well-nigh over the whole world of men, there would have been no need of counter-arguments to defend the existence of the gods; but as it is, they are necessary. For when the greatest laws are being destroyed by wicked men, who is more bound to come to their rescue than the lawgiver? No one. Come now, Clinias, do you also answer me again,