I never think of the future. It comes soon enough. When visiting the U.S. from Germany for a winter academic stay.

Striving for peace and preparing for war are incompatible with each other, and in our time more so than ever.

Considered logically this concept is not identical with the totality of sense impressions referred to; but it is an arbitrary creation of the human (or animal) mind.

Earth is the insane asylum of the universe.

Mere unbelief in a personal God is no philosophy at all.

Unless the cause of peace based on law gathers behind it the force and zeal of a religion, it hardly can hope to succeed.

Nationalism is the measels of mankind.