The door of the Free Exercise Clause stands tightly closed against any government regulation of religious beliefs as such. Government may neither compel affirmation of a repugnant belief, nor penalize or discriminate against individuals or groups because they hold views abhorrent to the authorities.

Use of a mentally ill person's involuntary confession is antithetical to the notion of fundamental fairness embodied in the due process clause.

We current justices read the Constitution in the only way that we can: as 20th-century Americans.

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].

There is no such thing as a false idea.

No longer is the female destined solely for the home and the rearing of the family and only the male for the marketplace and the world of ideas.

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