Debate on public issues should be uninhibited, robust and wide-open and that...may well include vehement, caustic, and sometimes unpleasantly sharp attacks on government and public officials.

The modern public school derived from a philosophy of freedom reflected in the First Amendment ... The non-sectarian or secular public school was the means of reconciling freedom in general with religious freedom.

Clerks get into the damnedest wrangles--which is the way they help me.

All ideas having even the slightest redeeming social importance - unorthodox ideas, controversial ideas, even ideas hateful to the prevailing climate of opinion, have the full protection of the guarantees [of the First Amendment].

If there is a bedrock principle underlying the First Amendment, it is that the government may not prohibit the expression of an idea simply because society finds the idea itself offensive or disagreeable.

Punishing desecration of the flag dilutes the very freedom that makes this emblem so revered.

We hold that the Constitution does not forbid the states minor intrusions into an individual's body under stringently limited conditions.