Common sense consists of those layers of prejudice laid down before the age of 18.

Life isn't worth living, unless it is lived for someone else.

When the nazis came to power, I looked to the universities that prided themselves upon their intellectual freedom, and they failed me. I looked to the German press, which prided itself on the freedom of the press, and it failed me. Until at last the churches stood alone, and that for which I once had little regard earned my respect.

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.

I have made the Bhagwad Gita as the main source of my inspiration and guide for the purpose of scientific investigations and formation of my theories.

The world we have created is a product of our thinking.

The real problem is in the hearts and minds of men. It is not a problem of physics but of ethics. It is easier to denature plutonium than to denature the evil spirit of man.