History of the Peloponnesian War
Thucydides
Thucydides, Vol. 1-4. Smith, Charles Foster, translator. London and Cambridge, MA: Heinemann and Harvard University Press, 1919-1923.
And if in any case oaths of reconcilement were exchanged, for the moment only were they binding, since each side had given them merely to meet the emergency, having at the time no other resource; but he who, when the opportunity offered and he saw his enemy off his guard, was the first to pluck up courage, found his revenge sweeter because of the violated pledge than if he had openly attacked, and took into account not only the greater safety of such a course, but also that, by winning through deceit, he was gaining besides the prize of astuteness. And in general it is easier for rogues to get themselves called clever than for the stupid to be reputed good,[*](Or, omitting ὄντες, “And in general men are more willing to be called clever rogues than good simpletons.”) and they are ashamed of the one but glory in the other. The cause of all these evils was the desire to rule which greed and ambition inspire, and also, springing from them, that ardour[*](Or, τὸ πρὸθυμον “party-spirit.”) which belongs to men who once have become engaged in factious rivalry.
For those who emerged as party leaders in the several cities, by assuming on either side a fair-sounding name, the one using as its catch-word “political equality for the masses under the law,” the other “temperate aristocracy,”[*](For the objectionable terms “democracy” (δημοκρατία) and “oligarchy” (ὀλιγαρχὶα).) while they pretended to be devoted to the common weal, in reality made it their prize; striving in every way to get the better of each other they dared the most awful deeds, and sought revenges still more awful, not pursuing these within the bounds of justice and the public weal, but limiting them, both parties alike, only by the moment's caprice; and they were ready, either by passing an unjust sentence of condemnation or by winning the upper hand through acts of violence, to glut the animosity of the moment. The result was that though neither had any regard for true piety, yet those who could carry through an odious deed under the cloak of a specious phrase received the higher praise. And citizens who belonged to neither party were continually destroyed by both, either because they would not make common cause with them, or through mere jealousy that they should survive.
So it was that every form of depravity showed itself in Hellas in consequence of its revolutions, and that simplicity, which is the chief element of a noble nature, was laughed to scorn and disappeared, while mutual antagonism of feeling, combined with mistrust, prevailed far and wide.