While it is true that science, to the extent of its grasp of causative connections, may reach important conclusions as to the compatibility and incompatibility of goals and evaluations, the independent and fundamental definitions regarding goals and values remain beyond science's reach.

The next world war will be fought with stones.

In conclusion I wish to say that in working at the problem here dealt with I have had the loyal assistance of my friend and colleague M. Besso, and that I am indebted to him for several valuable suggestions.

Striving for peace and preparing for war are incompatible with each other, and in our time more so than ever.

It is my conviction that killing under the cloak of war is nothing but an act of murder.

I believe that a simple and unassuming manner of life is best for everyone, best both for the body and the mind.

I agree with Schopenhauer that one of the most powerful motives that attracts people to science and art is the longing to escape from everyday life.