The world of physics is essentially the real world construed by mathematical abstractions, and the world of sense is the real world construed by the abstractions which the sense-organs immediately furnish. To suppose that the "material mode" is a primitive and groping attempt at physical conception is a fatal error in epistemology.

One can bear anything of which one is able to conceive.

The development of beings with minds is probably the highest individuation the world has ever known, and its prehistory is the history of life on earth.

If we would have new knowledge, we must get a whole world of new questions.

The seeds of civilization are in every culture, but it is city life that brings them to fruition.

Art is just as comprehensible as science, but in its own terms.

Most new discoveries are suddenly-seen things that were always there. A new idea is a light that illuminates presences which simply had no form before the light fell on them.