Every judgment in science stands on the edge of error, and is personal.

The world can only be grasped by action, not by contemplation.

The great poem and the deep theorem are new to every reader, and yet are his own experiences, because he himself recreates them.

A popular cliche in philosophy says that science is pure analysis or reductionism, like taking the rainbow to pieces; and art is pure synthesis, putting the rainbow together. This is not so. All imagination begins by analyzing nature.

A genius is a man who has two great ideas.

Power is the by-product of understanding.

Many theories of the ancient world seem terribly childish today, a hodge-podge of fables and false comparisons.But our theories will seem childish five-hundred years from now.Every theory is based on some analogy, and sooner or later the theory fails because the analogy turns out to be false. A theory in its day helps to solve the problems of the day.