Every great and deep difficulty bears in itself its own solution. It forces us to change our thinking in order to find it.

Predition is risky, especially of the future.

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.'

Everything we call real is made of things that cannot be regarded as real.

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

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

There are trivial truths and the great truths. The opposite of a trivial truth is plainly false. The opposite of a great truth is also true.