Plato, Letters 352a

τὰ δὴ μετὰ τὰ νῦν ῥηθέντα ἃ συμβουλεύω, σχεδὸν εἴρηταί τέ μοι καὶ εἰρήσθω· ὧν δʼ ἐπανέλαβον ἕνεκα τὴν εἰς Σικελίαν ἄφιξιν τὴν δευτέραν, ἀναγκαῖον εἶναι ἔδοξέ μοι ῥηθῆναι δεῖν διὰ τὴν ἀτοπίαν καὶ ἀλογίαν τῶν γενομένων. εἰ δʼ ἄρα τινὶ νῦν ῥηθέντα εὐλογώτερα ἐφάνη καὶ προφάσεις πρὸς τὰ γενόμενα ἱκανὰς ἔχειν ἔδοξέν τῳ, μετρίως ἂν ἡμῖν καὶ ἱκανῶς εἴη τὰ νῦν εἰρημένα.

has been given already, and so let it suffice. But I deemed it necessary to explain the reasons why I undertook my second journey to Sicily because absurd and irrational stories are being told about it. If, therefore, the account I have now given appears to anyone more rational, and if anyone believes that it supplies sufficient excuses for what took place, then I shall regard that account as both reasonable and sufficient.