Condemnation without investigation is the height of ignorance

A man must learn to understand the motives of human beings, their illusions, and their sufferings.

Without the sense of fellowship with men of like mind... life would have seemed to me empty.

Most people say that it is the intellect which makes a great scientist. They are wrong: it is character.

The most important human endeavor is the striving for morality in our actions. Our inner balance and even our very existence depend on it. Only morality in our actions can give beauty and dignity to life.

Scientific research can reduce superstition by encouraging people to think and view things in terms of cause and effect.

If a man aspires towards a righteous life, his first act of abstinence is from injury to animals.