The possibility of any definite predicate being true is the being of a corresponding character. That is the signification of the logical term “character.” A character belongs to whatever singulars the corresponding predicate could truly be asserted of; and a character which belongs to anything existent is thereby said itself to exist, and to exist in the singulars of which the predicate is true.
http://www.commens.org/dictionary/entry/quote-fourth-curiosity-21