Vigorous societies harbor a certain extravagance of objectives, so that men wander beyond the safe provision of personal gratifications.

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

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.

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

There are no whole truths: all truths are half-truths. It is trying to treat them as whole truths that plays to the devil.

We think in generalities, but we live in detail.

The future belongs to those who can rise above the confines of the earth.