If there is any principle of the Constitution that more imperatively calls for attachment than any other, it is the principle of free thought — not free thought for those who agree with us but freedom for the thought that we hate.

Oliver Wendell Holmes, Jr. (1841–1935) American jurist, Supreme Court Justice

United States v. Schwimmer, 279 U.S. 644 (1929) [Dissent]
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