The world must be set in order. The time has come when ethics must be dealt with by science, and never again by mere opinion.

The human being cannot live in a condition of emptiness for very long: if he is not growing toward something, he does not merely stagnate; the pent-up potentialities turn into morbidity and despair, and eventually into destructive activities.

The cost of inaction is far greater than the cost of action.

艺术是提出问题的方式，而不是给出答案。