I put forward as a general definition of civilization, that a civilized society is exhibiting the five qualities of Truth, Beauty, Adventure, Art, Peace.

Philosophy is the product of wonder.

No science can be more secure than the unconscious metaphysics which tacitly it presupposes.

Now in creative thought common sense is a bad master. Its sole criterion for judgement is that the new ideas shall look like the old ones. In other words it can only work by suppressing originality.

Human life is driven forward by its dim apprehension of notions too general for its existing language.

Faith in the possibility of science, generated antecedently to the development of modern scientific theory, is an unconscious derivative from medieval theology.

Mathematics, in its widest significance, is the development of all types of formal, necessary, deductive reasoning.