We used to think that if we knew one, we knew two, because one and one are two. We are finding that we must learn a great deal more about 'and'.

We are bits of stellar matter that got cold by accident, bits of a star gone wrong.

The electron, as it leaves the atom, crystallises out of Schrodinger's mist like a genie emerging from his bottle.

We have found that where science has progressed the farthest, the mind has but regained from nature that which the mind put into nature.

Our ultimate analysis of space leads us not to a "here" and a "there," but to an extension such as that which relates "here" and "there." To put the conclusion rather crudely-space is not a lot of points close together; it is a lot of distances interlocked.

The word reality frightens me.

But it is necessary to insist more strongly than usual that what I am putting before you is a model-the Bohr model atom-because later I shall take you to a profounder level of representation in which the electron instead of being confined to a particular locality is distributed in a sort of probability haze all over the atom.