“Too much consistency is as bad for the mind as it is for the body. Consistency is contrary to nature, contrary to life. The only completely consistent people are the dead.”

Political Disquisitions (1774)
Context: That government only can be pronounced consistent with the design of all government, which allows to the governed the liberty of doing what, consistently with the general good, they may desire to do, and which only forbids their doing the contrary. Liberty does not exclude restraint; it only excludes unreasonable restraint. To determine precisely how far personal liberty is compatible with the general good, and of the propriety of social conduct in all cases, is a matter of great extent, and demands the united wisdom of a whole people. And the consent of the whole people, as far as it can be obtained, is indispensably necessary to every law, by which the whole people are to be bound; else the whole people are enslaved to the one, or the few, who frame the laws for them.

Laboratory journal entry #10,040 (19 March 1849); published in The Life and Letters of Faraday (1870) Vol. II, edited by Henry Bence Jones https://archive.org/stream/lifelettersoffar02joneiala#page/248/mode/2up/search/wonderful,p.248.This has sometimes been quoted partially as "Nothing is too wonderful to be true," and can be seen engraved above the doorway of the south entrance to the Humanities Building at UCLA in Los Angeles, California. http://lit250v.library.ucla.edu/islandora/object/edu.ucla.library.universityArchives.historicPhotographs%3A67
Context: ALL THIS IS A DREAM. Still examine it by a few experiments. Nothing is too wonderful to be true, if it be consistent with the laws of nature; and in such things as these, experiment is the best test of such consistency.

Source: The Adventures of Tom Sawyer (1876), Ch. 2

Addresses to the German Nation (1807), Second Address : "The General Nature of the New Education". Chicago and London, The Open Court Publishing Company, 1922, p. 20.

" The Pinprick Argument https://www.utilitarianism.com/pinprick-argument.html", BLTC Research, 2005

Chap. VII: Noble Life And Common Life, Or Effort And Inertia
The Revolt of the Masses (1929)
Context: The mass-man would never have accepted authority external to himself had not his surroundings violently forced him to do so. As to-day, his surroundings do not so force him, the everlasting mass-man, true to his character, ceases to appeal to other authority and feels himself lord of his own existence. On the contrary the select man, the excellent man is urged, by interior necessity, to appeal from himself to some standard beyond himself, superior to himself, whose service he freely accepts.… Contrary to what is usually thought, it is the man of excellence, and not the common man who lives in essential servitude. Life has no savour for him unless he makes it consist in service to something transcendental. Hence he does not look upon the necessity of serving as an oppression. When, by chance, such necessity is lacking, he grows restless and invents some new standard, more difficult, more exigent, with which to coerce himself. This is life lived as a discipline — the noble life.

VI, 32
Meditations (c. 121–180 AD), Book VI

Speech on Military Preparedness, Pittsburgh (29 January 1916)
1910s
Context: We want the spirit of America to be efficient; we want American character to be efficient; we want American character to display itself in what I may, perhaps, be allowed to call spiritual efficiency—clear, disinterested thinking and fearless action along the right lines of thought. America is not anything if it consists of each of us. It is something only if it consists of all of us; and it can consist of all of us only as our spirits are banded together in a common enterprise.