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.

An ocean traveler has even more vividly the impression that the ocean is made of waves than that it is made of water.

It is a primitive form of thought that things exist or do not exist.

If I let my fingers wander idly over the keys of a typewriter it might happen that my screed made an intelligible sentence. If an army of monkeys were strumming on typewriters they might write all the books in the British Museum. The chance of their doing so is decidedly more favourable than the chance of the molecules returning to one half of the vessel.

[When thinking about the new relativity and quantum theories] I have felt a homesickness for the paths of physical science where there are ore or less discernible handrails to keep us from the worst morasses of foolishness.

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