Chapter V. Apostolicity. 63 Church of Christ; for our Lord predicted that His Church should ever be as a city placed upon the mountain top, that all might see it, and that its ministers should preach the truths of salvation from the watch-towers thereof, that all might hear them. It is equally in vain to tell me that you were allied in faith to the various Christian sects that went out from the Catholic Church from age to age; for these sects proclaimed doctrines diametrically opposed to one another, and the true Church must be one in faith. And besides, the less relationship you claim with many of these seceders the better for you, as they all advocated errors against Christian truth, and some of them disseminated principles at variance with decency and morality. [048] The Catholic Church, on the contrary, can easily vindicate the title of Apostolic, because she derives her origin from the Apostles. Every Priest and Bishop can trace his genealogy to the first disciples of Christ with as much facility as the most remote branch of a vine can be traced to the main stem. All the Catholic Clergy in the United States, for instance, were ordained only by Bishops who are in active communion with the See of Rome. These Bishops themselves received their commissions from the Bishop of Rome. The present Bishop of Rome, Pius IX., is the successor of Gregory XVI., who succeeded Pius VIII., who was the successor of Leo XII. And thus we go back from century to century till we come to Peter, the first Bishop of Rome, Prince of the Apostles and Vicar of Christ. Like the Evangelist Luke, who traces the genealogy of our Savior back to Adam and to God, we can trace the pedigree of Pius IX. to Peter and to Christ. There is not a link wanting in the chain which binds the humblest Priest in the land to the Prince of the Apostles. And although on a few occasions there happened to be two or even three claimants for the chair of Peter, these counter-claims could no more affect the validity of the legitimate Pope than the struggle of two contestants for the Presidency could invalidate the title of the recognized Chief Magistrate.