Imagination is more powerful than knowledge.

If the facts don't fit the theory, change the facts.

It is a miracle that curiosity survives formal education.

Some men spend a lifetime in an attempt to comprehend the complexities of women. Others pre-occupy themselves with somewhat simpler tasks, such as understanding the theory of relativity!

One cannot learn so well as by experiencing it oneself.

Marriage is but slavery made to appear civilized.

I always have a high regard for the individual and have an insuperable distaste for violence and clubmanship. All these motives made me into a passionate pacifist and anti-militarist. I am against any nationalism, even in the guise of mere patriotism. Privileges based on position and property have always seemed to me unjust and pernicious, as did any exaggerated personality cult.