Plato, Laws 897d

εἰ δὲ μανικῶς τε καὶ ἀτάκτως ἔρχεται, τὴν κακήν. καὶ ταῦτα ὀρθῶς. τίνα οὖν δὴ νοῦ κίνησις φύσιν ἔχει; τοῦτο ἤδη χαλεπόν, ὦ φίλοι, ἐρώτημα ἀποκρινόμενον εἰπεῖν ἐμφρόνως· διὸ δὴ καὶ ἐμὲ τῆς ἀποκρίσεως ὑμῖν δίκαιον τὰ νῦν προσλαμβάνειν. εὖ λέγεις. μὴ τοίνυν ἐξ ἐναντίας οἷον εἰς ἥλιον ἀποβλέποντες, νύκτα ἐν μεσημβρίᾳ ἐπαγόμενοι, ποιησώμεθα τὴν ἀπόκρισιν, ὡς νοῦν ποτε θνητοῖς ὄμμασιν ὀψόμενοί τε καὶ γνωσόμενοι

But the bad soul, if it proceeds in a mad and disorderly way. That also is right. Then what is the nature of the motion of reason? Here, my friends, we come to a question that is difficult to answer wisely; consequently, it is fitting that you should now call me in to assist you with the answer. Very good. In making our answer let us not bring on night, as it were, at midday, by looking right in the eye of the sun, as though with mortal eyes we could ever behold reason and know it fully;