What we observe is not nature itself, but nature exposed to our method of questioning.

Natural science, does not simply describe and explain nature; it is part of the interplay between nature and ourselves.

For Germany, the war was like an end game in chess in which she possessed one castle less than her adversary. The loss of the war was as certain as the loss of an end game under these conditions.

If we made atomic bombs, we would bring about a terrible change in the world. Who knows what would happen from this?

The problems of language here are really serious. We wish to speak in some way about the structure of the atoms. But we cannot speak about atoms in ordinary language.

The uncertainty principle refers to the degree of indeterminateness in the possible present knowledge of the simultaneous values of various quantities with which the quantum theory deals; it does not restrict, for example, the exactness of a position measurement alone or a velocity measurement alone.