We are still too close to the birth of the universe to be certain about its death.

All that glitters may not be gold, but at least it contains free electrons.

The very bulk of scientific publications is itself delusive. It is of very unequal value; a large proportion of it, possibly as much as three-quarters, does not deserve to be published at all, and is only published for economic considerations which have nothing to do with the real interests of science.

The only way of learning the method of science is the long and bitter way of personal experience.

The human mind evolved always in the company of the human body, and of the animal body before it was human. The intricate connections of mind and body must exceed our imagination, as from our point of view we are peculiarly prevented from observing them.

The present aristocracy of western culture, at the very moment when it most clearly dominates the world, is being imitated rapidly and successfully in every eastern country.

The psychology of a complex mind must differ almost as much from that of a simple, mechanized mind as its psychology would from ours; because something that must underlie and perhaps be even greater than sex is involved.