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

Cats are rather delicate creatures and they are subject to a good many different ailments, but I have never heard of one who suffered from insomnia.

How anyone can profess to find animal life interesting and yet take delight in reducing the wonder of any animal to a bloody mass of fur or feathers?

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.

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.

The impulse to mar and to destroy is as ancient and almost as nearly universal as the impulse to create. The one is an easier way than the other of demonstrating power.

If people destroy something replaceable made by mankind, they are called vandals; if they destroy something irreplaceable made by God, they are called developers.