“Though it is folly to suppose that happiness is a matter of volition, and that we can make ourselves content and cheerful whenever we choose — a theory that many poor hypochondriacs are taunted with till they are nigh driven mad — yet, on the other hand, no sane mind is ever left without the power of self-discipline and self-control in a measure, which measure increases in proportion as it is exercised.”

Good people have become a defeated class in Blair's Britain, argues Theodore Dalrymple http://www.socialaffairsunit.org.uk/blog/archives/001464.php (March 29, 2007).
The Social Affairs Unit (2006 - 2008)

Letter to his brother Frank (12 March 1932), published in Robert Oppenheimer : Letters and Recollections (1995) edited by Alice Kimball Smith, p. 155
Context: I believe that through discipline, though not through discipline alone, we can achieve serenity, and a certain small but precious measure of the freedom from the accidents of incarnation, and charity, and that detachment which preserves the world which it renounces. I believe that through discipline we can learn to preserve what is essential to our happiness in more and more adverse circumstances, and to abandon with simplicity what would else have seemed to us indispensable; that we come a little to see the world without the gross distortion of personal desire, and in seeing it so, accept more easily our earthly privation and its earthly horror — But because I believe that the reward of discipline is greater than its immediate objective, I would not have you think that discipline without objective is possible: in its nature discipline involves the subjection of the soul to some perhaps minor end; and that end must be real, if the discipline is not to be factitious. Therefore I think that all things which evoke discipline: study, and our duties to men and to the commonwealth, war, and personal hardship, and even the need for subsistence, ought to be greeted by us with profound gratitude, for only through them can we attain to the least detachment; and only so can we know peace.

Source: The Strength To Dream (1961), p. 197
Context: No artist can develop without increasing his self-knowledge; but self-knowledge supposes a certain preoccupation with the meaning of human life and the destiny of man. A definite set of beliefs — Methodist Christianity, for example — may only be a hindrance to development; but it is not more so than Beckett's refusal to think at all. Shaw says somewhere that all intelligent men must be preoccupied with either religion, politics, or sex. (He seems to attribute T. E. Lawrence's tragedy to his refusal to come to grips with any of them.) It is hard to see how an artist could hope to achieve any degree of self-knowledge without being deeply concerned with at least one of the three.

Source: The Human Side of Enterprise (1960), p. 326

Song to the Hunter

Source: A Brief History of Time (1988), Ch. 9
Context: Just like a computer, we must remember things in the order in which entropy increases. This makes the second law of thermodynamics almost trivial. Disorder increases with time because we measure time in the direction in which disorder increases. You can’t have a safer bet than that!

Introduction
Capitalism and Freedom (1962)
Context: The free man will ask neither what his country can do for him nor what he can do for his country. He will ask rather "What can I and my compatriots do through government" to help us discharge our individual responsibilities, to achieve our several goals and purposes, and above all, to protect our freedom? And he will accompany this question with another: How can we keep the government we create from becoming a Frankenstein that will destroy the very freedom we establish it to protect? Freedom is a rare and delicate plant. Our minds tell us, and history confirms, that the great threat to freedom is the concentration of power. Government is necessary to preserve our freedom, it is an instrument through which we can exercise our freedom; yet by concentrating power in political hands, it is also a threat to freedom. Even though the men who wield this power initially be of good will and even though they be not corrupted by the power they exercise, the power will both attract and form men of a different stamp.

in his memoirs, as quoted by [Jean Matricon, G. Waysand, Charles Glashausser, The cold wars: a history of superconductivity, Rutgers University Press, 2003, 0813532957, 18]

U. S. Senate, Committee on Energy and Natural Resources. Hearings on sovereignty under S. 472 (June 23, 1998)