It is the business of the future to be dangerous; and it is among the merits of science that it equips the future for its duties.

It is impossible not to feel stirred at the thought of the emotions of man at certain historic moments of adventure and discovery - Columbus when he first saw the Western shore, Pizarro when he stared at the Pacific Ocean, Franklin when the electric spark came from the string of his kite, Galileo when he first turned his telescope to the heavens. Such moments are also granted to students in the abstract regions of thought, and high among them must be placed the morning when Descartes lay in bed and invented the method of co-ordinate geometry.

Speech is human nature itself, with none of the artificiality of written language.

Every epoch has its character determined by the way its population reacts to the material events which they encounter.

In the conditions of modern life the rule is absolute, the race which does not value trained intelligence is doomed. Not all your heroism, not all your social charm, not all your wit, not all your victories on land or at sea, can move back the finger of fate. To-day we maintain ourselves. To-morrow science will have moved forward yet one more step, and there will be no appeal from the judgment which will then be pronounced on the uneducated.

Each human being is a more complex structure than any social system to which he belongs.

You cannot evade quantity. You may fly to poetry and music, and quantity and number will face you in your rhythms and your octaves.