Plato, Laws 822c

περὶ θεοὺς τὰ αὐτὰ ταῦτα ἐξαμαρτανόντων ἡμῶν, ἆρʼ οὐκ οἰόμεθα ὃ γελοῖόν τε καὶ οὐκ ὀρθὸν ἐκεῖ γιγνόμενον ἦν ἂν τότε, νῦν ἐνταυθοῖ καὶ ἐν τούτοισι γίγνεσθαι γελοῖον μὲν οὐδαμῶς, οὐ μὴν οὐδὲ θεοφιλές γε, ψευδῆ φήμην ἡμῶν κατὰ θεῶν ὑμνούντων. ἀληθέστατα, εἴπερ γε οὕτω ταῦτʼ ἐστίν. οὐκοῦν ἂν μὲν δείξωμεν οὕτω ταῦτʼ ἔχοντα, μαθητέα μέχρι γε τούτου τὰ τοιαῦτα πάντα, μὴ δειχθέντων δὲ ἐατέον; καὶ ταῦτα ἡμῖν οὕτω συγκείσθω;

about gods, do we not think that what would have been ludicrous and wrong there and then is, here and now and in dealing with this subject, by no means ludicrous and assuredly not pleasing to the gods, when concerning gods we repeat a tale that is false? Very true, if the facts are as you say. Then, if we demonstrate that they really are so, shall all these subjects be learnt up to the point mentioned, and, failing that demonstration, be left alone? Is that to be our agreement?