The scientist finds his reward in what Henri Poincare calls the joy of comprehension, and not in the possibility of application to which any discovery may lead.

Only six men in the world know about relativity. I am not one of them. When I ask them to explain, they confused me.

... we will hope that future historians will explain the morbid symptoms of present-day society as the childhood ailments of an aspiring humanity, due entirely to the excessive speed at which civilization was advancing.

The minority, the ruling class at present, has the schools and press, usually the Church as well, under its thumb. This enables it to organize and sway the emotions of the masses, and make its tool of them.

All that is valuable in human society depends upon the opportunity for development accorded the individual.

The development of general ability for independent thinking and judgment should always be placed foremost, not the acquisition of special knowledge.

There is no place in this new kind of physics both for the field and matter, for the field is the only reality.