Murder and capital punishment are not opposites that cancel one another, but similars that breed their kind. It is the deed that teaches not the name we give it.

I ... must continue to strive for more knowledge and more power, though the new knowledge always contradicts the old and the new power is the destruction of the fools who misuse it.

The sex illusion is not a fixed quantity: not what mathematicians call a constant. It varies from zero in my wife's case to madness in that of our stepsister.

Life's no brief candle-it's a splendid torch!

Progress is impossible without change; and those who cannot change their minds cannot change anything.

All censorships exist to prevent anyone from challenging current conceptions and existing institutions.

I'm sick of all the reasonable people: they see all the reasons for doing nothing