The propensity to truck, barter and exchange one thing for another is common to all men, and to be found in no other race of animals.
Men are rather reasoning than reasonable animals, for the most part governed by the impulse of passion.
Humans are amphibians half spirit and half animal. As spirits they belong to the eternal world, but as animals they inhabit time.
Anthropomorphic animals, when taken out of narrative into actual visibility, always turn into buffoonery or nightmare.
We are in a far better position to observe instincts in animals or in primitives than in ourselves. This is due to the fact that we have grown accustomed to scrutinizing our own actions and to seeking rational explanations for them.