Plato, Letters 353c

αὐτῶν γεγονότων, δίκαιόν που τοῖς σώσασιν πάντας χάριν ἔχειν· εἰ δέ τι τὸν μετέπειτα χρόνον ἡ τυραννὶς οὐκ ὀρθῶς τῇ τῆς πόλεως δωρεᾷ κατακέχρηται, τούτων δίκας τὰς μὲν ἔχει, τὰς δὲ τινέτω. τίνες οὖν δὴ δίκαι ἀναγκαίως ὀρθαὶ γίγνοιντʼ ἂν ἐκ τῶν ὑπαρχόντων αὐτοῖς; εἰ μὲν ῥᾳδίως ὑμεῖς ἀποφυγεῖν οἷοί τʼ ἦτε αὐτοὺς καὶ ἄνευ μεγάλων κινδύνων καὶ πόνων, ἢ ʼκεῖνοι ἑλεῖν εὐπετῶς πάλιν τὴν ἀρχήν, οὐδʼ ἂν συμβουλεύειν οἷόν τʼ ἦν τὰ μέλλοντα ῥηθήσεσθαι· νῦν

it is surely right that they should be repaid with gratitude by all those whom they saved. But if in after times the tyrant’s house has wrongly abused the bounty of the city, the penalty for this it has suffered in part, and in part it will have to pay. What, then, is the penalty rightly to be exacted from them under existing circumstances? If you were able to get quit of them easily, without serious dangers and trouble, or if they were able to regain the empire without difficulty, then, in either case, it would not have been possible for me so much as to offer the advice which I am now about to utter; but as it is, both of you ought to bear in mind