The only use of a knowledge of the past is to equip us for the present. The present contains all that there is. It is holy ground; for it is the past, and it is the future.

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

The misconception which has haunted philosophic literature throughout the centuries is the notion of 'independent existence.' There is no such mode of existence; every entity is to be understood in terms of the way it is interwoven with the rest of the universe.

It is the business of the future to be dangerous.

The guiding motto in the life of every natural philosopher should be, seek simplicity and distrust it.

The main importance of Francis Bacon's influence does not lie in any peculiar theory of inductive reasoning which he happened to express, but in the revolt against second-hand information of which he was a leader.

That knowledge which adds greatness to character is knowledge so handled as to transform every phase of immediate experience.