Who sleepeth with dogs shall rise with fleas.

Man, when perfected, is the best of animals, but when separated from law and justice, he is the worst of all. 

Of all the creatures that breathe and creep on the surface of the earth, none is more to be pitied than man.

Man is merely a more perfect animal than the rest. He reasons better.

Be a good animal, true to your animal instincts.

If you are a dog and your owner suggests that you wear a sweater, suggest that he wear a tail.

Man is the only animal that can remain on friendly terms with the victims he intends to eat until he eats them.

In every man is a wild beast; most of them don’t know how to hold it back, and the majority give it full rein when they are not restrained by terror of law.

An ape will be an ape, though clad in purple.

A bull contents himself with one meadow, and one forest is enough for a thousand elephants; but the little body of a man devours more than all other living creatures.

The righteous know the needs of their animals, but the mercy of the wicked is cruel.

I do not mean to call an elephant a vulgar animal, but if you think about him carefully, you will find that his nonvulgarity consists in such gentleness as is possible to elephantine nature—not in his insensitive hide, nor in his clumsy foot, but in the way he will lift his foot if a child lies in his way; and in his sensitive trunk, and still more sensitive mind, and capability of pique on points of honor.

Animals are such agreeable friends—they ask no questions, they pass no criticisms.