Every really new idea looks crazy at first.

Seek simplicity but distrust it.

Mathematics, in its widest significance, is the development of all types of formal, necessary, deductive reasoning.

Seek simplicity, then distrust.

Art is the imposing of a pattern on experience, and our aesthetic enjoyment is recognition of the pattern.

Human life is driven forward by its dim apprehension of notions too general for its existing language.

Our rate of progress is such that an individual human being, of ordinary length of life, will be called on to face novel situations which find no parallel in his past. The fixed person, for the fixed duties, who, in older societies was such a godsend, in the future will be a public danger.