“The generation of the man who swears truly is better thenceforward.”
Source: Works and Days (c. 700 BC), line 285.
Original
Ἀνδρὸς δ᾽ εὐόρκου γενεὴ μετόπισθεν ἀμείνων.
Help us to complete the source, original and additional information
Hesiod 61
Greek poetRelated quotes

The Tragic Sense of Life (1913), VIII : From God to God
Context: And He is the God of the humble, for in the words of the Apostle, God chose the foolish things of the world to confound the wise and the weak things of the world to confound the things which are mighty (I Cor. i. 27) And God is in each of us in the measure in which one feels Him and loves Him. "If of two men," says Kierkegaard, "one prays to the true God without sincerity of heart, and the other prays to the an idol with all the passion of an infinite yearning, it is the first who really prays to the idol, while the second really prays to God." It would be better to say that the true God is He to whom man truly prays and whom man truly desires. And there may even be a truer revelation in superstition itself than in theology.
“The most truly generous persons are those who give silently without hope of praise or reward.”
Source: Caddie Woodlawn's Family

1860s, Our Composite Nationality (1869)
Context: The next objection to the Chinese is that he cannot be induced to swear by the Bible. This is to me one of his best recommendations. The American people will swear by any thing in the heaven above or the earth beneath. We are a nation of swearers. We swear by a book whose most authoritative command is to swear not at all. It is not of so much importance what a man swears by, as what he swears to, and if the Chinaman is so true to his convictions that he cannot be tempted or even coerced into so popular a custom as swearing by the Bible, he gives good evidence of his integrity and of his veracity. Let the Chinaman come; he will help to augment the national wealth; he will help to develop our boundless resources; he will help to pay off our national debt; he will help to lighten the burden of our national taxation; he will give us the benefit of his skill as manufacturer and as a tiller of the soil, in which he is unsurpassed.

“That man is not truly brave who is afraid either to seem or to be, when it suits him, a coward.”
Marginalia http://www.easylit.com/poe/comtext/prose/margin.shtml (November 1844)

As quoted in A Book of French Quotations (1963) by Norbert Guterman, p. 365

“By my soul I swear, there is no power in the tongue of man to alter me.”
Source: The Merchant of Venice