One thing I have learned in a long life: that all our science, measured against reality, is primitive and childlike -- and yet it is the most precious thing we have.

Nothing truly valuable can be achieved except by the unselfish cooperation of many individuals.

"There's been a quantum leap technologically in our age, but unless there's another quantum leap in human relations, unless we learn to live in a new way towards one another, there will be a catastrophe."

Scientists were rated as great heretics by the church, but they were truly religious men because of their faith in the orderliness of the universe.

To get to know a country, you must have direct contact with the earth. It's futile to gaze at the world through a car window.

With all my heart I believe that the world's present system of sovereign nations can only lead to barbarism, war and inhumanity, and that only world law can assure progress towards a civilized peaceful community.

Knowledge is limited.