The opening of 1. Of the institution of the apostolic primacy in Blessed Peter.
We, therefore, teach and declare that, according to the testimony of the Gospel, the primacy of jurisdiction was immediately and directly promised to Blessed Peter the Apostle, and on him conferred by Christ the Lord. For it had been said before to Simon; Thou shalt be called Cephas, and afterwards on occasion of the confession made by him; Thou art the Christ, the Son of the living God, it was to Simon alone that the Lord addressed the words: Blessed art thou, Simon Bar-Jona, because flesh and blood hath not revealed it to thee, but my Father who is in Heaven. And I say to thee that thou art Peter; and upon this rock I will build my Church, and the gates of hell shall not prevail against it. And I will give to thee the keys of the kingdom of Heaven. And whatsoever thou shalt bind upon earth, it shall be bound also in heaven, and whatsoever thou shalt loose on earth it shall be loosed also in heaven.