S. Austin Allibone, comp. Prose Quotations from Socrates to Macaulay. 1880.
A mediator is considered two ways, by nature or by office, as the fathers distinguish. He is a mediator by nature, as partaking of both natures, divine and human; and mediator by office, as transacting matters between God and man.
The use of language and custom of speech in all authors I have met with has gone upon this rule or maxim: that exclusive terms are always to be understood in opposition only to what they are opposed to, and not in opposition to what they are not opposed to.