The horizon of many people is a circle with a radius of zero. They call this their point of view.

Work is the only thing that gives substance to life.

If you're not sure why you're doing something, you can never do enough of it. Imagination is more important than knowledge.

The unleashed power of the atom has changed everything except our thinking. Thus, we are drifting toward catastrophe beyond conception. We shall require a substantially new manner of thinking if mankind is to survive.

Intuitive powers played a central role in my scientific work, not wild speculation, yet a valued resource when no other approach was available.

If you want to find out anything from the theoretical physicists about the methods they use, I advise you to stick closely to one principle: don't listen to their words, fix your attention on their deeds. To him who is a discoverer in this field the products of his imagination appear so necessary and natural that he regards them, and would like to have them regarded by others, not as creations of thought but as given realities.

The world will not be destroyed by those who do evil, but by those who watch them without doing anything.