“The perils of change are so great the promise of the most hopeful theories is so often deceptive, that it is frequently the wiser part to uphold the existing state of things, if it can be done, even though, in point of argument, it should be utterly indefensible…Resistance is folly or heroism—a virtue or a vice—in most cases, according to the probabilities there are of its being successful.”

Nos vertus ne sont, le plus souvent, que de vices déguisés.
Epigraph. Note: "This epigraph, which is the key to the system of La Rochefoucauld, is found in another form as No. 179 of the Maxims of the first edition, 1665; it is omitted from the second and third, and reappears for the first time in the fourth edition at the head of the Reflections". Aime Martin, editor, Bartlett's Quotations, 1919 edition.
Reflections; or Sentences and Moral Maxims (1665–1678)

Source: On Nature (1874), p. 102
Context: Conformity to nature has no connection whatever with right and wrong. The idea can never be fitly introduced into ethical discussions at all, except, occasionally and partially, into the question of degrees of culpability. To illustrate this point, let us consider the phrase by which the greatest intensity of condemnatory feeling is conveyed in connection with the idea of nature - the word "unnatural." That a thing is unnatural, in any precise meaning which can be attached to the word, is no argument for its being blamable; since the most criminal actions are to a being like man not more unnatural than most of the virtues.

Designing the Future (2007)

Napoleon : In His Own Words (1916)

Civil Disobedience (1849)

IV, 1
Meditations (c. 121–180 AD), Book IV

Source: Patriotism and Christianity http://en.wikisource.org/wiki/Patriotism_and_Christianity (1896), Ch. 17
Context: No feats of heroism are needed to achieve the greatest and most important changes in the existence of humanity; neither the armament of millions of soldiers, nor the construction of new roads and machines, nor the arrangement of exhibitions, nor the organization of workmen's unions, nor revolutions, nor barricades, nor explosions, nor the perfection of aerial navigation; but a change in public opinion.
And to accomplish this change no exertions of the mind are needed, nor the refutation of anything in existence, nor the invention of any extraordinary novelty; it is only needful that we should not succumb to the erroneous, already defunct, public opinion of the past, which governments have induced artificially; it is only needful that each individual should say what he really feels or thinks, or at least that he should not say what he does not think.

Source: "Overcoming resistance to change." 1948, p. 512