Death comes to all, but great achievements build a monument which shall endure until the sun grows cold.

Enthusiasm is the mother of effort, and without it nothing great was ever achieved.

Great men are they who see that spiritual is stronger than any material force - that thoughts rule the world.

A man's work is nothing but this slow trek to rediscover, through the detours of art, those two or three great and simple images in whose presence his heart first opened.

I call upon the scientific community in our country, those who gave us nuclear weapons, to turn their great talents now to the cause of mankind and world peace: to give us the means of rendering these nuclear weapons impotent and obsolete.