“There must be no barriers to freedom of inquiry … There is no place for dogma in science. The scientist is free, and must be free to ask any question, to doubt any assertion, to seek for any evidence, to correct any errors.”

Vol. 1, Notes to the Chapters: Ch. 7, Note 4
The Open Society and Its Enemies (1945)
Context: The so-called paradox of freedom is the argument that freedom in the sense of absence of any constraining control must lead to very great restraint, since it makes the bully free to enslave the meek. The idea is, in a slightly different form, and with very different tendency, clearly expressed in Plato.
Less well known is the paradox of tolerance: Unlimited tolerance must lead to the disappearance of tolerance. If we extend unlimited tolerance even to those who are intolerant, if we are not prepared to defend a tolerant society against the onslaught of the intolerant, then the tolerant will be destroyed, and tolerance with them. — In this formulation, I do not imply, for instance, that we should always suppress the utterance of intolerant philosophies; as long as we can counter them by rational argument and keep them in check by public opinion, suppression would certainly be unwise. But we should claim the right to suppress them if necessary even by force; for it may easily turn out that they are not prepared to meet us on the level of rational argument, but begin by denouncing all argument; they may forbid their followers to listen to rational argument, because it is deceptive, and teach them to answer arguments by the use of their fists or pistols. We should therefore claim, in the name of tolerance, the right not to tolerate the intolerant. We should claim that any movement preaching intolerance places itself outside the law, and we should consider incitement to intolerance and persecution as criminal, in the same way as we should consider incitement to murder, or to kidnapping, or to the revival of the slave trade, as criminal.

Source: The Limits of State Action (1792), Ch. 1

Source: The Mark of Athena

Source: The Perpetual Calendar of Inspiration

2011 - 2015

1961, Address at the University of Washington
Context: No one should be under the illusion that negotiations for the sake of negotiations always advance the cause of peace. If for lack of preparation they break up in bitterness, the prospects of peace have been endangered. If they are made a forum for propaganda or a cover for aggression, the processes of peace have been abused. But it is a test of our national maturity to accept the fact that negotiations are not a contest spelling victory or defeat. They may succeed — they may fail. They are likely to be successful only if both sides reach an agreement which both regard as preferable to the status quo — an agreement in which each side can consider its own situation to be improved. And this is most difficult to obtain. But, while we shall negotiate freely, we shall not negotiate freedom. Our answer to the classic question of Patrick Henry is still no-life is not so dear, and peace is not so precious, "as to be purchased at the price of chains and slavery." And that is our answer even though, for the first time since the ancient battles between Greek city-states, war entails the threat of total annihilation, of everything we know, of society itself. For to save mankind's future freedom, we must face up to any risk that is necessary. We will always seek peace — but we will never surrender.

Source: Poet in New York

Miranda v. Arizona, 384 U. S. 436, 445 (1965) - Opinion of the Court
Context: Prior to any questioning, the person must be warned that he has a right to remain silent, that any statement he does make may be used as evidence against him, and that he has a right to the presence of an attorney, either retained or appointed. The defendant may waive effectuation of these rights, provided the waiver is made voluntarily, knowingly and intelligently. If, however, he indicates in any manner and at any stage of the process that he wishes to consult with an attorney before speaking there can be no questioning. Likewise, if the individual is alone and indicates in any manner that he does not wish to be interrogated, the police may not question him. The mere fact that he may have answered some questions or volunteered some statements on his own does not deprive him of the right of refrain from answering any further inquiries until he has consulted with an attorney and thereafter consents to be questioned.

Kevin Strom, "All America Must Know the Terror That is Upon Us" http://www.amfirstbooks.com/IntroPages/ToolBarTopics/Articles/Featured_Authors/strom,_kevin/kevin_strom_works/Kevin_Strom_1991-1994/Kevin_A._Strom_19930814-ADV_All_America_Must_Know_the_Terror_That_Is_Upon_Us.html (1993)
Misattributed
Variant: "To learn who rules over you, simply find out who you are not allowed to criticize."