A hundred thousand million Stars make one Galaxy; A hundred thousand million Galaxies make one Universe. The figures may not be very trustworthy, but I think they give a correct impression.

Never accept a fact until it has been verified by theory.

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.

I don't believe any experiment until it is confirmed by theory. I find this is a witty inversion of "conventional" wisdom.

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

Science is one thing, wisdom is another. Science is an edged tool, with which men play like children, and cut their own fingers.

Shuffling is the only thing which Nature cannot undo.