It has been stated--and they who hold this language form, as it were, the extreme group of opposers--that the Apostolic Letters mentioned in the Syllabus are the only documents which have authoritative force; that the latter, on the contrary, has no proper weight of its own--absolutely none, whether as a dogmatic definition, or as a disciplinary measure, or even as a moral and intellectual direction. To these assertions, not a little hazardous, have been added others whose rashness would fain be hidden under the veil of rhetorical artifices. We will lift the veil, and expose the naked assertions. The meaning of the Syllabus, it is stated, must not be looked for in the Syllabus, but in the pontifical letters whence it is drawn. The study of the letters may be useful; not only is that of the Syllabus not so, but it is dangerous, because it often leads to lamentable exaggerations. To know the true doctrines of Rome, we must search the letters for them, not the Syllabus. In fact, to sum up all in a few words, as a condemnation of error and a manifestation of truth, the letters are all, the Syllabus nothing. The other group, which we may describe as the moderates, knows how to guard itself against excess. It does not diminish the authority of the Syllabus to the extent of annihilation. Very far from it--it recognizes it and proclaims it aloud; but, struck with the peculiar form given to the act, it asserts that it is impossible to discover in it the marks of a dogmatic definition, and, to borrow a stock expression, of a definition _ex cathedra_. The Syllabus, it is said, is undoubtedly something by itself--to deny it would be ridiculous and absurd. It has a weight of its own; who would venture to dispute it? It may be termed, if you please, an universal law of the church, so only that its pretensions be not carried further, and that it does not claim to be considered an infallible decision of the Vicar of Jesus Christ. What, then, have we to do but to demonstrate that the Syllabus is by itself, and independently of the pontifical acts which supply the matter of it, a veritable teaching; that this teaching obliges consciences because it issues from the infallible authority of the head of the church? We shall not have omitted, it seems to us, any of the considerations calculated to throw light on this important subject if, after having thus followed it through all its windings and discussed all its difficulties, we succeed in illustrating the triple character of the pontifical act--its doctrinal character, its obligatory character, and its character of infallibility.