"It is our conviction that if souls were visible to the eye we should distinctly see this strange fact that each individual of the human species corresponds to some one of the species of the animal creation; and we should clearly recognise the truth, hardly percieved by thinkers, that, from the oyster to the eagle, from the swine to the tiger, all animals are in man, and that each of them is in a man; sometimes even, several of them at a time.
Animals are nothing but the forms of our virtues and vices wandering before our eyes, the visible phantoms of our souls."
From Les Miserables