The way to combat noxious ideas is with other ideas. The way to combat falsehoods is with truth.

The right to revolt has sources deep in our history.

We deal with a right of privacy older than the Bill of Rights-older than our political parties, older than our school system.

The privacy and dignity of our citizens [are] being whittled away by sometimes imperceptible steps. Taken individually, each step may be of little consequence.…

We are not afraid to follow truth wherever it may lead, nor to tolerate any error so long as reason is left free to combat it.

Surely it is more interesting to argue about what the truth is, than about what some particular thinker, however great, did or did not think.

I disapprove of what you say, but I will defend to the death your right to say it.