“For when every judgement is the act of hym that judgeth, it behoveth that every man performe hys worke and purpose, not by any forayne or straunge power or facultie, but by his owne proper power, and strength.”
Tr. George Colville (1556); source https://books.google.com/books?id=649EAQAAIAAJ&pg=PA129
The Consolation of Philosophy · De Consolatione Philosophiae, Book V
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Anicius Manlius Severinus Boethius 22
philosopher of the early 6th century 480Related quotes

“For every one feels to what purpose he can use his own powers. Before the horns of a calf appear and sprout from his forehead, he butts with them when angry, and pushes passionately.”
Sentit enim vis quisque suas quoad possit abuti.
cornua nata prius vitulo quam frontibus extent,
illis iratus petit atque infestus inurget.
Book V, lines 1033–1035 (tr. Bailey)
De Rerum Natura (On the Nature of Things)

Veto Mesage Regarding the Bank of the United States http://avalon.law.yale.edu/19th_century/ajveto01.asp (10 July 1832).
1830s
Context: It is to be regretted that the rich and powerful too often bend the acts of government to their selfish purposes. Distinctions in society will always exist under every just government. Equality of talents, of education, or of wealth can not be produced by human institutions. In the full enjoyment of the gifts of Heaven and the fruits of superior industry, economy, and virtue, every man is equally entitled to protection by law; but when the laws undertake to add to these natural and just advantages artificial distinctions, to grant titles, gratuities, and exclusive privileges, to make the rich richer and the potent more powerful, the humble members of society — the farmers, mechanics, and laborers — who have neither the time nor the means of securing like favors to themselves, have a right to complain of the injustice of their government. There are no necessary evils in government. Its evils exist only in its abuses. If it would confine itself to equal protection, and, as Heaven does its rains, shower its favors alike on the high and the low, the rich and the poor, it would be an unqualified blessing.

“The brave man carves out his fortune, and every man is the son of his own works.”
Source: Don Quixote de la Mancha (1605–1615), Part I, Book I, Ch. 4.

The Virtue of Selfishness (1964)
Source: The Virtue of Selfishness: A New Concept of Egoism