It is the business of the future to be dangerous.

The difference between ancients and moderns is that the ancients asked what have we experienced, and moderns asked what can we experience.

Education should turn out the pupil with something he knows well and something he can do well.

The aim of science is to seek the simplest explanation of complex facts. We are apt to fall into the error of thinking that the facts are simple because simplicity is the goal of our quest. The guiding motto in the life of every natural philosopher should be ``Seek simplicity and distrust it.''

The vigor of civilized societies is preserved by the widespread sense that high aims are worth-while.

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

Fertilization of the soul is the reason for the necessity of art.