Art flourishes where there is a sense of adventure.

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.

In all education the main cause of failure is staleness.

Without adventure civilization is in full decay. ... The great fact [is] that in their day the great achievements of the past were the adventures of the past.

The great achievements of the past were the adventures of the past. Only the adventurous can understand the greatness of the past.

What is morality in any given time or place? It is what the majority then and there happen to like and immorality is what they dislike.

Algebra reverses the relative importance of the factors in ordinary language. It is essentially a written language, and it endeavors to exemplify in its written structures the patterns which it is its purpose to convey. The pattern of the marks on paper is a particular instance of the pattern to be conveyed to thought. The algebraic method is our best approach to the expression of necessity, by reason of its reduction of accident to the ghostlike character of the real variable.