When asked ... [about] an underlying quantum world, Bohr would answer, 'There is no quantum world. There is only an abstract quantum physical description. It is wrong to think that the task of physics is to find out how nature is. Physics concerns what we can say about Nature.'

The meaning of life consists in the fact that it makes no sense to say that life has no meaning.

The opposite of a fact is falsehood, but the opposite of one profound truth may very well be another profound truth.

It is, indeed, perhaps the greatest prospect of humanistic studies to contribute through an increasing knowledge of the history of cultural development to that gradual removal of prejudices which is the common aim of all science.

If anybody says he can think about quantum physics without getting giddy, that only shows he has not understood the first thing about them.

Truth is something that we can attempt to doubt, and then perhaps, after much exertion, discover that part of the doubt is not justified.

Anybody who is not shocked by this subject has failed to understand it. [of quantum mechanics]