The future belongs to those who can rise above the confines of the earth.

Our reasonings grasp at straws for premises and float on gossamers for deductions.

The art of progress is to preserve order amid change, and to preserve change amid order. Life refuses to be embalmed alive. The more prolonged the halt in some unrelieved system of order, the greater the crash of the dead society.

An enormous part of our mature experience cannot not be expressed in words.

Aristotle discovered all the half-truths which were necessary to the creation of science.

The real history does not get written, because it is not in people's brains but in their nerves and vitals.

I regret that it has been necessary for me in this lecture to administer a large dose of four-dimensional geometry. I do not apologize, because I am really not responsible for the fact that nature in its most fundamental aspect is four-dimensional. Things are what they are.