Life is the enjoyment of emotion, derived from the past and aimed at the future.

Algebra is the intellectual instrument which has been created for rendering clear the quantitative aspects of the world.

The paradox is now fully established that the utmost abstractions are the true weapons with which to control our thought of concrete fact.

Religion is the vision of something which stands beyond, behind, and within, the passing flux of immediate things; something which is real, and yet waiting to be realised; something which is a remote possibility, and yet the greatest of present facts; something that gives meaning to all that passes, and yet eludes apprehension; something whose possession is the final good, and yet is beyond all reach; something which is the ultimate ideal, and the hopeless quest.

We must produce a great age, or see the collapse of the upward striving of our race.

Without adventure civilization is in full decay. ... The great fact [is] that in their day the great achievements of the past were the adventures of the past.

Education is the acquisition of the art of the utilisation of knowledge.