Systems, scientific or philosophic, come and go. Each method of limited understanding is at length exhausted. In its prime each system is a triumphant success: in its decay it is an obstructive nuisance.

The learned tradition is not concerned with truth, but with the learned adjustment of learned statements of antecedent learned people.

In formal logic, a contradiction is the signal of defeat, but in the evolution of real knowledge it marks the first step in progress toward a victory.

It requires a very unusual mind to undertake the analysis of the obvious.

The science of pure mathematics, in its modern developments, may claim to be the most original creation of the human spirit.

A Unitarian is a person who believes in at most one God.

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