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 of the members of the Apostolate, the allotment among them of apostolic powers and privileges, and more especially of the gift of infallibility.

It is manifest that there exists for the purposes of the Apostolate a number of different organs adjusted together so as to form one well-ordered whole, the several members of which share, according to their rank, in the various powers and privileges of the Apostolate. Taken in a wide sense, this body embraces all the members of the Church Teaching who in any way co-operate in the attainment of the ends of the Apostolate. In a narrower sense, however, the Teaching Body is understood to consist only of the highest members of the Hierarchy of Orders, who are at the same time by Divine institution the ordinary members of the Hierarchy of Jurisdiction, viz. the Pope and the Bishops. In them the fulness of the Apostolate resides, whereas the lower members are only their auxiliaries. We shall treat first of the organization of the Teaching Body itself; then of its auxiliaries; and lastly of its connection with the body of the Faithful.

I. The principles which determine the composition of the Teaching Body are the following:—

1. The first object to be attained by means of the Apostolate is the universal diffusion of Revelation, paving the way for supernatural Faith. For this purpose a number of consecrated organs of the Holy Ghost are required, to be authentic witnesses and teachers. As representatives of Christ, they must be endowed with a doctrinal authority corresponding to their rank, and must have power to appoint auxiliaries and to superintend and direct the Faith of their subjects.

2. The second object of the Apostolate is to produce unity of Faith and doctrine. To accomplish this, one supreme representative of Christ is required, to preside over the whole organization, and to possess a universal and sovereign doctrinal power.

3. The unity resulting from this sovereign power is threefold: material unity of the Teaching Body, consisting in the juridical union of the members with their Head, in virtue of which they have and hold their functions—a