Athenian Oath

The Athenian Oath, also known as the Ephebic Oath.

I will not bring dishonour on my sacred arms nor will I abandon my comrade wherever I shall be stationed. I will defend the rights of gods and men and will not leave my country smaller, when I die, but greater and better, so far as I am able by myself and with the help of all. I will respect the rulers of the time duly and the existing ordinances duly and all others which may be established in the future. Furthermore, if anyone seeks to destroy the ordinances I will oppose him so far as I am able by myself and with the help of all. I will honor the cults of my fathers. Witnesses to this shall be the gods Agraulus, Hestia, Enyo, Enyalius, Ares, Athena the Warrior, Zeus, Thallo, Auxo, Hegemone, Heracles, and the boundaries of my native land, wheat, barley, vines, olive-trees, fig-trees..

A pretty high bar for most of our political class. Love that a 2,500 year old declaration is still both inspiring and pertinent.

Alternative translations include:

I will never bring reproach upon my hallowed arms, nor will I desert the comrade at whose side I stand, but I will defend our altars and our hearths, single-handed or supported by many. My native land I will not leave a diminished heritage, but greater and better than when I received it. I will obey whoever is in authority, and submit to the established laws and all others that the people shall harmoniously enact. If anyone tries to overthrow the constitution or disobeys it, I will not permit him, but will come to its defence single-handed or with the support of all. I will honour the religion of my fathers. Let the gods be my witness: Agraulus, Enyalius, Ares, Zeus, Thallo, Auxo, Hegemone.

Also

We will never bring disgrace on this our City by an act of dishonesty or cowardice. We will fight for the ideals and Sacred Things of the City both alone and with many. We will revere and obey the City's laws, and will do our best to incite a like reverence and respect in those above us who are prone to annul them or set them at naught. We will strive unceasingly to quicken the public's sense of civic duty. Thus, in all these ways, we will transmit this City not only, not less, but greater and more beautiful than it was transmitted to us.