Nature is probably quite indifferent to the aesthetic preferences of mathematicians.

Civilization advances by extending the number of important operations which we can perform without thinking about them. Operations of thought are cavalry charges in a battle - they are limited in number, they require fresh horses, and must only be made at decisive moments.

Life is complex in its expression, involving more than percipience, namely desire, emotion, will, and feeling.

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

An open mind is all very well in its way, but it ought not to be so open that there is no keeping anything in or out of it.

Art flourishes where there is a sense of adventure, a sense of nothing having been done before, of complete freedom to experiment.

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