Out of complexity, find simplicity!

The more a country makes military weapons, the more insecure it becomes: if you have weapons, you become a target for attack.

The State is made for Mankind, not mankind for the state

Without changing our pattern of thought, we will not be able to solve the problems we created with our current patterns of thought

Be kind to people who are different from you.

Do not worry about your difficulties in Mathematics. I can assure you mine are still greater.

Freedom of teaching and of opinion in book or press is the foundation for the sound and natural development of any people.