My present work concerns the problems connected with the theory of elementary particles, the theory of gravitation and cosmology and I shall be glad if I can manage to make some contribution to these important branches of science.

International affairs must be completely permeated with scientific methodology and a democratic spirit, with a fearless weighing of all facts, views, and theories, with maximum publicity of ultimate and intermediate goals, and with a consistency of principles.

You can't sit on two chairs at once.

Do not trust governments more than governments trust their own people.

I could not stop something I knew was wrong and terrible. I had an awful sense of powerlessness.

Intellectual freedom is the only guarantee of a scientific - democratic approach to politics, economic development, and culture.

I regard the death penalty as a savage and immoral institution that undermines the moral and legal foundations of society.