Both the cockroach and the bird would get along very well without us, although the cockroach would miss us most.

Any euphemism ceases to be euphemistic after a time and the true meaning begins to show through. It's a losing game, but we keep on trying.

The famous balance of nature is the most extraordinary of all cybernetic systems. Left to itself, it is always self-regulated.

True tragedy may be defined as a dramatic work in which the outward failure of the principal personage is compensated for by the dignity and greatness of his character.

Man is, perhaps, no more prone to war than he used to be and no more inclined to commit other evil deeds. But a given amount of ill will or folly will go further than it used to.

It is not ignorance but knowledge which is the mother of wonder.

Two-legged creatures we are supposed to love as we love ourselves. The four-legged, also, can come to seem pretty important. But six legs are too many from the human standpoint.