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

What is morality in any given time or place? It is what the majority then and there happen to like and immorality is what they dislike.

Order is not sufficient. What is required, is something much more complex. It is order entering upon novelty; so that the massiveness of order does not degenerate into mere repetition; and so that the novelty is always reflected upon a background of system.

The aim of science is to seek the simplest explanation of complex facts... Seek simplicity and distrust it.

Art attracts us only by what it reveals of our most secret self.

Art flourishes where there is a sense of adventure.

The only use of knowledge of the past is to equip us for the present.