of matters virtually, mediately, or indirectly contained in, related to, or connected with the body of doctrine which is formally revealed, and is either categorically proposed or capable of being proposed by the church as of divine and Catholic faith. Bishop Fessler confines himself to that which has been defined in express terms by the council, and must be held as an article of faith by every Catholic, under pain of incurring anathema as a heretic. This definition respects directly the Pope, speaking as Pope, as being the subject, of whom the same infallibility is predicated which is predicated of the Catholic Church. The object of infallibility is obliquely defined, and only so far as necessary to the precise definition of the subject, which is the Pope speaking _ex cathedrâ_. As to the object, or extension of infallibility, no specific definition has been made. The definition is generic only. That is, it gives in general terms those matters which are in the genus of faith and morals, as the object of infallible teaching. The truths formally revealed are the basis of all doctrine in any way respecting faith and morals which is theological; and they control all doctrine which is philosophical, concerning our relations to God and creatures, at least negatively. Therefore, taken in its most restricted sense, infallibility in faith and morals must denote infallibility in teaching and defining these formally-revealed truths. So much, then, respecting the object, is necessarily _de fide_, and is held as such by every theologian and every instructed Catholic.