Quotations about   marketplace of ideas

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Persecution for the expression of opinions seems to me perfectly logical. If you have no doubt of your premises or your power, and want a certain result with all your heart, you naturally express your wishes in law, and sweep away all opposition. To allow opposition by speech seems to indicate that you think the speech impotent, as when a man says that he has squared the circle, or that you do not care wholeheartedly for the result, or that you doubt either your power or your premises.

But when men have realized that time has upset many fighting faiths, they may come to believe even more than they believe the very foundations of their own conduct that the ultimate good desired is better reached by free trade in ideas — that the best test of truth is the power of the thought to get itself accepted in the competition of the market, and that truth is the only ground upon which their wishes safely can be carried out.

That, at any rate, is the theory of our Constitution. It is an experiment, as all life is an experiment. Every year, if not every day, we have to wager our salvation upon some prophecy based upon imperfect knowledge. While that experiment is part of our system, I think that we should be eternally vigilant against attempts to check the expression of opinions that we loathe and believe to be fraught with death, unless they so imminently threaten immediate interference with the lawful and pressing purposes of the law that an immediate check is required to save the country.

Oliver Wendell Holmes, Jr. (1841-1935) American jurist, Supreme Court Justice
Abrams v. United States, 250 U.S. 616 (1919) [dissent]
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Added on 23-Apr-19 | Last updated 23-Apr-19
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So then, I am simply in favor of intellectual hospitality — that is all. You come to me with a new idea. I invite you into the house. Let us see what you have. Let us talk it over. If I do not like your thought, I will bid it a polite “good day.” If I do like it, I will say: “Sit down; stay with me, and become a part of the intellectual wealth of my world.” That is all.

Robert Green Ingersoll (1833-1899) American lawyer, agnostic, orator
“The Limits of Toleration,” debate at the Nineteenth Century Club, New York (8 May 1888)
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Books won’t stay banned. They won’t burn. Ideas won’t go to jail. In the long run of history, the censor and the inquisitor have always lost. The only sure weapon against bad ideas is better ideas. The source of better ideas is wisdom. The surest path to wisdom is a liberal education.

Alfred Whitney Griswold (1906–1963) American historian, educator
“A Little Learning,” address to students, Phillips Academy, Andover (Spring 1952)

Reprinted in The Atlantic Monthly (Nov 1952)
Added on 8-Feb-08 | Last updated 1-Dec-16
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We are not afraid to entrust the American people with unpleasant facts, foreign ideas, alien philosophies, and competitive values. For a nation that is afraid to let its people judge the truth and falsehood in an open market is a nation that is afraid of its people.

John F. Kennedy (1917-1963) US President (1961-63)
“Remarks on the 20th Anniversary of the Voice of America” (speech), Washington, DC (26 Feb 1962)
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Added on 1-Feb-04 | Last updated 4-Jul-14
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It is not best that we should all think alike; it is differences of opinion that make horse races.

Twain - horse races - wist_info quote

Mark Twain (1835-1910) American writer [pseud. of Samuel Clemens]
The Tragedy of Pudd’nhead Wilson, ch. 19, epigraph (1894)
Added on 1-Feb-04 | Last updated 29-Feb-16
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