Our rate of progress is such that an individual human being, of ordinary length of life, will be called on to face novel situations which find no parallel in his past. The fixed person, for the fixed duties, who, in older societies was such a godsend, in the future will be a public danger.

I consider Christian theology to be one of the great disasters of the human race.

After you understand about the sun and the stars and the rotation of the earth, you may still miss the radiance of the sunset.

One main factor in the upward trend of animal life has been the power of wandering.

It is the business of the future to be dangerous; and it is among the merits of science that it equips the future for its duties.

In order to acquire learning, we must first shake ourselves free of it.

The many become one and are increased by one.