Boredom is the feeling that everything is a waste of time; serenity, that nothing is.

Knowledge is gained by learning; trust by doubt; skill by practice; and love by love.

I favor free trade in drugs for the same reason the Founding Fathers favored free trade in ideas: in a free society it is none of the government's business what ideas a man puts into his mind; likewise, it should be none of its business what drugs he puts into his body.

If someone does something we disapprove of, we regard him as bad if we believe we can deter him from persisting in his conduct, but we regard him as mad if we believe we cannot.

The FDA calls certain substances "controlled." But there are no "controlled substances," there are only controlled citizens.

I believe the time has come to acknowledge that the practice of routine circumcision rests on the absurd premise that the only mammal in creation born in the condition that requires immediate surgical correction is the human male.

Classifying thoughts, feelings and behaviors as diseases is a logical and semantic error, like classifying whale as fish.