Everything is energy and that’s all there is to it.

We owe a lot to the Indians, who taught us how to count, without which no worthwhile scientific discovery could have been made.

He who can no longer pause to wonder and stand rapt in awe, is as good as dead; his eyes are closed.

After a certain high level of technical skill is achieved science and art tend to coalesce in aesthetics, plasticity, and form. The greatest scientists are artists as well.

How can he possibly be humble? He hasn't done anything yet.

(Reply on what constitutes scientific proof:)"The question is much too difficult for me.

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.