Histories are more full of examples of the fidelity of dogs than of friends.

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

Man is a troublesome animal and therefore is not very manageable.

Imitate the ass in his love to his master.

Man is the only animal that laughs and weeps, for he is the only animal that is struck with the difference between what things are and what they ought to be.

What delight can there be, and not rather displeasure, in hearing the barking and howling of dogs? Or what greater pleasure is there to be felt when a dog followeth a hare than when a dog followeth a dog?

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

There be beasts that, at a year old, observe more, and pursue that which is for their good more prudently, than a child can do at ten.

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.

Men, my dear, are very queer animals—a mixture of horse nervousness, ass stubbornness, and camel malice.

Keep running after a dog, and he will never bite you.

It is remarkable that only small birds properly sing.