The understanding between a non-technical writer and his reader is that he shall talk more or less like a human being and not like an Act of Parliament. I take it that the aim of such books must be to convey exact thought in inexact language... he can never succeed without the co-operation of the reader.

Oh leave the Wise our measures to collate. One thing at least is certain, light has weight. One thing is certain and the rest debate. Light rays, when near the Sun, do not go straight.

Shuffling is the only thing which Nature cannot undo.

There is no space without aether, and no aether which does not occupy space.

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

The physical world is entirely abstract and without actuality apart from its linkage to consciousness.

Every body continues in its state of rest or uniform motion in a straight line, except insofar as it doesn't.