“In order to live free and happily, you must sacrifice boredom. It is not always an easy sacrifice.”

Sacrifice
Song lyrics, Sleeping with the Past (1989)

Source: The National System of Political Economy (1841), Ch. 12

Source: Incest: From a Journal of Love

1937 speech, quoted in "The Trial of the Germans" - Page 57 - by Eugene Davidson - History - 1997

1960, The New Frontier
Context: For the harsh facts of the matter are that we stand on this frontier at a turning-point in history. We must prove all over again whether this nation — or any nation so conceived — can long endure — whether our society — with its freedom of choice, its breadth of opportunity, its range of alternatives — can compete with the single-minded advance of the Communist system. Can a nation organized and governed such as ours endure? That is the real question. Have we the nerve and the will? Can we carry through in an age where we will witness not only new breakthroughs in weapons of destruction — but also a race for mastery of the sky and the rain, the ocean and the tides, the far side of space and the inside of men's minds? Are we up to the task — are we equal to the challenge? Are we willing to match the Russian sacrifice of the present for the future — or must we sacrifice our future in order to enjoy the present? That is the question of the New Frontier. That is the choice our nation must make — a choice that lies not merely between two men or two parties, but between the public interest and private comfort — between national greatness and national decline — between the fresh air of progress and the stale, dank atmosphere of "normalcy" — between determined dedication and creeping mediocrity. All mankind waits upon our decision. A whole world looks to see what we will do. We cannot fail their trust, we cannot fail to try.

Quoted in Morrow's International Dictionary of Contemporary Quotations, 1982, Jonathon Green.
Attributed

Vietnamese Proclamation of Independence (2 September 1945), Ho Chi Minh, Selected Works (1960-1962), Vol. 3, pp. 17-21
Context: A people who have courageously opposed French domination for more than eighty years, a people who have fought side by side with the Allies against the Fascists during these last years, such a people must be free and independent.
For these reasons, we, members of the Provisional Government of the Democratic Republic of Vietnam, solemnly declare to the world that Vietnam has the right to be a free and independent country and in fact it already has been so. The entire Vietnamese people are determined to mobilise all their physical and mental strength, to sacrifice their lives and property in order to safeguard their independence and liberty.

Source: East of Midnight (1977), Chapter 16, “Sorcery East of Midnight” (p. 169)