My only refuge, as a serious young man, from the despair of my financial burden to my family, is that I did everything I could to never permit myself any amusements or diversions except those afforded by my studies.

My comprehension of God comes from a deeply felt conviction of a superior intelligence that reveals itself in the knowable world.

Mere praise of peace is easy and ineffective. What is needed is acitve participation in the fight against war and everything which leads to it.

I never made one of my discoveries through the process of rational thinking

I have always disliked the fierce competitive spirit embodied in that highly intellectual game.

I regard class differences as contrary to justice and, in the last resort, based on force.

I'd rather be an optimist and a fool than a pessimist and right.