I do not believe that a moral philosophy can ever be founded on a scientific basis. … The valuation of life and all its nobler expressions can only come out of the soul’s yearning toward its own destiny. Every attempt to reduce ethics to scientific formulas must fail. Of that I am perfectly convinced.

I want to know the thoughts of God. Everything else is just details.

But if the longing for the achievement of the goal is powerfully alive within us, then shall we not lack the strength to find the means for reaching the goal and for translating it into deeds.

While I am a convinced pacifist there are circumstances in which I believe the use of force is appropriate - namely, in the face of an enemy unconditionally bent on destroying me and my people.

We cannot resolve the problems of the world by unsing the same techniques that have created them.

Mankind must give up war in the Atomic Era. What is at stake is the life or death of humanity.

The solution to this problem lies in the heart of mankind.