We have enslaved the rest of the animal creation, and have treated our distant cousins in fur and feathers so badly that beyond doubt, if they were able to formulate a religion, they would depict the Devil in human form.

There are two kinds of fools: one says, 'This is old, therefore it is good'; the other says, 'This is new, therefore it is better.'

Civilization is a disease which is almost invariably fatal.

Worry is interest paid on a trouble before it is due.