Laudator Temporis Acti

Demosthenes, Olynthiacs 2.10 (tr. J.H. Vince):

It is impossible, men of Athens, impossible to gain permanent power by injustice, perjury, and falsehood. Once in a way and for a brief season such things endure, and fed with hopes make, it may be, a brave show of blossom, but at the last they are detected and fall to pieces. For a house, I take it, or a ship or anything of that sort must have its chief strength in its substructure; and so too in affairs of state the principles and the foundations must be truth and justice.

οὐ γὰρ ἔστιν, οὐκ ἔστιν, ὦ ἄνδρες Ἀθηναῖοι, ἀδικοῦντα καὶ ἐπιορκοῦντα καὶ ψευδόμενον δύναμιν βεβαίαν κτήσασθαι, ἀλλὰ τὰ τοιαῦτ᾿ εἰς μὲν ἅπαξ καὶ βραχὺν χρόνον ἀντέχει, καὶ σφόδρα γ᾿ ἤνθησεν ἐπὶ ταῖς ἐλπίσιν, ἂν τύχῃ, τῷ χρόνῳ δὲ φωρᾶται καὶ περὶ αὑτὰ καταρρεῖ. ὥσπερ γὰρ οἰκίας, οἶμαι, καὶ πλοίου καὶ τῶν ἄλλων τῶν τοιούτων τὰ κάτωθεν ἰσχυρότατ᾿ εἶναι δεῖ, οὕτω καὶ τῶν πράξεων τὰς ἀρχὰς καὶ τὰς ὑποθέσεις ἀληθεῖς καὶ δικαίας εἶναι προσήκει.

T.R. Glover ad loc.: