Metaphysics is the science of proving what we don't understand.

In the whole history of the world there is but one thing that money cannot buy...to wit--the wag of a dog's tail.

Be like a postage stamp. Stick to one thing until you get there.

Method is the arithmetic of success.

Common sense is the knack of seeing things as they are, and doing things as they ought to be done.

There is gravity in wisdom, but no particular wisdom in gravity.

Selfish people, with no heart to speak of, have the best time of it.