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

It is wrong to think that the task of physics is to find out how nature is. Physics concerns what we say about nature.

No paradox, no progress.

We are trapped by language to such a degree that every attempt to formulate insight is a play on words.

Rutherford is a man you can rely on; he comes regularly and enquires how things are going and talks about the smallest details - Rutherford is such an outstanding man and really interested in the work of all the people around him.

The present state of atomic theory is characterized by the fact that we not only believe the existence of atoms to be proved beyond a doubt, but also we even believe that we have an intimate knowledge of the constituents of the individual atoms.

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