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.

If we do not permit the earth to produce beauty and joy, it will in the end not produce food, either.

If only the fit survive and if the fitter they are the longer they survive, then Volvox must have demonstrated its superb fitness more conclusively than any higher animal ever has.

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.

In a cat's eye, all things belong to cats.

Metaphysics may be, after all, only the art of being sure of something that is not so and logic only the art of going wrong with confidence.

Love is ...not a fact in nature of which we become aware, but rather a creation of the human imagination.