It is in the external world that the four dimensions are united -- not the relations of the external world to the individual which constitute his direct acquaintance with space and time.

Schrodinger's wave-mechanics is not a physical theory, but a dodge -- and a very good dodge too.

Schrodinger's theory is now enjoying the full tide of popularity, partly because of intrinsic merit, but also, I suspect, partly because it is the only one of the three that is simple enough to be misunderstood.

We do not defend the validity of seeing beauty in a natural landscape; we accept with gratitude the fact that we are so endowed as to see it that way.

The quest of the absolute leads into the four-dimensional world.

All authorities seem to be agreed that at, or nearly at, the root of everything in the physical world lies the mystic formula qp-pq=ih/2pi. We do not yet understand that; probably if we could understand it we should not think it so fundamental.

Not only is the universe stranger than we imagine, it is stranger than we can imagine.

The mathematics is not there till we put it there.

The man in the street is always making this demand for concrete explanation of the things referred to in science; but of necessity he must be disappointed. It is like our experience in learning to read. That which is written in a book is symbolic of a story in real life.

We are left with the indisputable but irritating conclusion: 0 = 0. This is a favourite device that mathematical equations resort to, when we propound stupid questions.