As a slave is a particular species of property, let us by all means inquire into the nature of property in general, and the acquisition of money, according to the manner we have proposed. In the first place then, some one may doubt whether the getting of money is the same thing as economy, or whether it is a part of it, or something subservient to it; and if so, whether it is as the art of making shuttles is to the art of weaving, or the art of making brass to that of statue founding, for they are not of the same service; for the one supplies the tools, the other the matter: by the matter I mean the subject out of which the work is finished, as wool for the cloth and brass for the statue.