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

Animals are in possession of themselves; their soul is in possession of their body. But they have no right to their life, because they do not will it. 

Every creature in the world is like a book and a picture, to us, and a mirror.

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

It is remarkable that only small birds properly sing.

Imitate the ass in his love to his master.

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

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

Alas! We are ridiculous animals.

Animals have these advantages over man: they never hear the clock strike, they die without any idea of death, they have no theologians to instruct them, their last moments are not disturbed by unwelcome and unpleasant ceremonies, their funerals cost them nothing, and no one starts lawsuits over their wills.

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 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?