Wisdom is not to be obtained from textbooks, but must be coined out of human experience in the flame of life.

All logic texts are divided into two parts. In the first part, on deductible logic, the fallacies are explained; in the second part, on inductive logic, they are committed.

Again, both literature and philosophy work by appealing to certain reigning idols.

Liberalism is an attitude rather than a set of dogmas - an attitude that insists upon questioning all plausible and self-evident propositions, seeking not to reject them but to find out what evidence there is to support them rather than their possible alternatives.

Wisdom is not to be obtained from textbooks, but must be coined out of human experience in the flame of life.

If religion cannot restrain evil, it cannot claim effective power for good.

Cruel persecutions and intolerance are not accidents, but grow out of the very essence of religion, namely, its absolute claims.