There are limits on liberty, as there are limits on authority. The broad principle of those limits is generally recognized and accepted; no liberties… - Henry Steele Commager

Who among American heroes could meet their tests, who would be cleared by their committees? Not Washington, who was a rebel. Not Jefferson, who wrote that all men are created equal and whose motto was "rebellion to tyrants is obedience to God." Not Garrison, who publicly burned the Constitution; or Wendell Phillips, who spoke for the underprivileged everywhere and counted himself a philosophical anarchist; not Seward of the Higher Law or Sumner of racial equality. Not Lincoln, who admonished us to have malice toward none, charity for all; or Wilson, who warned that our flag was "a flag of liberty of opinion as well as of political liberty"; or Justice Holmes, who said that our Constitution is an experiment and that while that experiment is being made "we should be eternally vigilant against attempts to check the expression of opinions that we loathe and believe to be fraught with death."

This approach emphasizes what was once familiar enough to all Americans—and what we are now in danger of forgetting—that government derives its power from men; that rights of life and liberty are inalienable; that these rights are not something that government graciously confers upon men, but things no government can take away from men.

The search for subversives results in the intimidation of the independent, the original, the imaginative, and the experimental-minded… It discourages the discussion of controversial matters in the classroom, for such discussion may be reported, or misreported, and cause trouble.