revealed truths, and only prevents the Pope from omitting this investigation and from erring in making it. The Divine assistance is not granted to the Pope for his personal benefit, but for the benefit of the Church. Nevertheless, it is granted to him directly as the successor of St. Peter, and not indirectly through the medium of the Church. The extent of the Infallibility of the Pope is determined partly by its subject-matter, partly by the words “possessed of that Infallibility with which the Divine Redeemer willed that His Church should be endowed for defining doctrine regarding Faith or Morals.” Moreover, the object of the Infallibility of the Pope and of the Infallibility of the Church being the same, their extent must also coincide.
From the Infallibility of ex cathedra judgments, the council deduces their Irreformability, and further establishes the latter by excluding the consent of the Church as the necessary condition of it. The approbation of the Church is the consequence not the cause of the Irreformability of ex cathedra judgments.
III. Ex cathedra decisions admit of great variety of form. At the same time, in the documents containing such decisions only those passages are infallible which the judge manifestly intended to be so. Recommendations, proofs, and explanations accompanying the decision are not necessarily infallible, except where the explanation is itself the dogmatic interpretation of a text of Scripture, or of a rule of Faith, or in as far as it fixes the meaning and extent of the definition. It is not always easy to draw the line between the definition and the other portions of the document. The ordinary rules for interpreting ecclesiastical documents must be applied. The commonest forms of ex cathedra decisions used at the present time are the following:—
1. The most solemn form is the Dogmatic Constitution, or Bull, in which the decrees are proposed expressly as ecclesiastical laws, and are sanctioned by heavy penalties; e.g. the Constitutions Unigenitus and Auctorem Fidei against the Jansenists, and the Bull Ineffabilis Deus on the Immaculate Conception.
2. Next in solemnity are Encyclical Letters, so far as
