Letters

² Of all nouns the sense of some, which are predicated of subjects plural and numerically various, is more general; as for instance man. When we so say, we employ the noun to indicate the common nature, and do not confine our meaning to any one man in particular who is known by that name. Peter, for instance is no more man, than Andrew, John, or James. The predicate therefore being common, and extending to all the individuals ranked under the same name, requires some note of distinction whereby we may understand not man in general, but Peter or John in particular.

Of some nouns on the other hand the denotation is more limited; and by the aid of the limitation we have before our minds not the common nature, but a limitation of anything, having, so far as the peculiarity extends, nothing in common with what is of the same kind; as for instance, Paul or Timothy. For, in a word, of this kind there is no extension to what is common in the nature; there is a separation of certain circumscribed conceptions from the general idea, and expression of them by means of their names. Suppose then that two or more are set together, as, for instance, Paul, Silvanus, and Timothy, and that an enquiry is made into the essence or substance of humanity; no one will give one definition of essence or substance in the case of Paul, a second in that of Silvanus, and a third in that of Timothy; but the same words which have been employed in setting forth the essence or substance of Paul will apply to the others also. Those who are described by the same definition of essence or substance are of the same essence or substance when the enquirer has learned what is common, and turns his attention to the differentiating properties whereby one is distinguished from another, the definition by which each is known will no longer tally in all particulars with the definition of another, even though in some points it be found to agree.