In every age of well-marked transition, there is the pattern of habitual dumb practice and emotion which is passing and there is oncoming a new complex of habit.

It does not matter what men say in words, so long as their activities are controlled by settled instincts. The words may ultimately destroy the instincts; but until this has occurred, words do not count.

All practical teachers know that education is a patient process of mastery of details, minute by minute, hour by hour, day by day.

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

Through and through the world is infested with quantity: To talk sense is to talk quantities. It is no use saying the nation is large. . . . How large? It is no use saying the radium is scarce. . . . How scarce? You cannot evade quantity. You may fly to poetry and music, and quantity and number will face you in your rhythms and your octaves.

Algebra reverses the relative importance of the factors in ordinary language.

It is the business of future to be dangerous.... The major advances in civilization are processes that all but wreck the societies in which they occur.