Give me that which I want, and you shall have that which you want, is the meaning of every such offer; and it is in this manner that we obtain from one another the far greater part of those good offices which we stand in need of.
[W]ithout the disposition to truck, barter, and exchange, every man must have procured to himself every necessary and conveniency of life which he wanted.
…a common stock, where every man may purchase whatever part of the produce of other men’s talents he has occasion for.
Nobody ever saw a dog make a fair and deliberate exchange of one bone for another with another dog. Nobody ever saw one animal by its gestures and natural cries signify to another, this is mine, that yours; I am willing to give this for that.
The difference between … a philosopher and a common [sic] street porter … seems to arise not so much from nature, as from habit, custom, and education.
Each animal is … obliged to support and defend itself, separately and independently, and derives no sort of advantage from that variety of talents with which nature has distinguished its fellows.