It ought to be realized by all dog owners that obesity shortens a dog's life quite considerably, a life which is much too short anyhow.

The scientist knows very well that he is approaching ultimate truth only in an asymptotic curve and is barred from ever reaching it; but at the same time he is proudly aware of being indeed able to determine whether a statement is a nearer or a less near approach to the truth.

More than any other product of human scientific culture scientific knowledge is the collective property of all mankind.

Visualize yourself confronted with the task of killing, one after the other, a cabbage, a fly, a fish, a lizard, a guinea pig, a cat, a dog, a monkey and a baby chimpanzee. In the unlikely case that you should experience no greater inhibitions in killing the chimpanzee than in destroying the cabbage or the fly, my advice to you is to commit suicide at your earliest possible convenience, because you are a weird monstrosity and a public danger.

Few animals display their mood via facial expressions as distinctly as cats.

There is no faith which has never yet been broken, except that of a truly faithful dog

Humor and knowledge are the two great hopes of our culture.