Man ... can go up against gravitation in a balloon, and why should he not hope that ultimately he may be able to stop or accelerate his drift along the Time-Dimension, or even turn about and travel the other way.

Now they stumbled in the shackles of humanity, lived in a fear that never died, fretted by a law they could not understand; their mock-human existence began in an agony, was one long internal struggle, one long dread of Moreau - and for what? It was the wantonness that stirred me.

There is no more evil thing in this world than race prejudice, none at all. [...] It justifies and holds together more baseness, cruelty, and abomination than any other sort of error in the world.

The great trouble with you Americans is that you are still under the influence of that second-rate - shall I say third-rate? - mind, Karl Marx.

When she was fifteen if you'd told her that when she was twenty she'd be going to bed with bald-headed men and liking it, she would have thought you very abstract.

Heresies are experiments in man's unsatisfied search for truth.

When the history of civilization is written, it will be a biological history and Margaret Sanger will be its heroine.