In the most modern theories of physics probability seems to have replaced aether as "the nominative of the verb 'to undulate'."

It cannot be denied that for a society which has to create scarcity to save its members from starvation, to whom abundance spells disaster, and to whom unlimited energy means unlimited power for war and destruction, there is an ominous cloud in the distance though at present it be no bigger than a man's hand.

The word reality frightens me.

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.

There was a time when we wanted to be told what an electron is. The question was never answered. No familiar conceptions can be woven around the electron; it belongs to the waiting list.

Shuffling is the only thing which Nature cannot undo.

Human life is proverbially uncertain; few things are more certain than the solvency of a life-insurance company.