And these Apostolic powers, legislative, judicial, and executive, are afterwards referred to as exercised; as in Acts ch. xv., where the first council passes decrees which bind the Church, nay, which go forth in the joint name of the Holy Ghost, and the rulers of the Church, "It hath seemed good to the Holy Ghost and to us;"--which are delivered by S. Paul to the cities to be kept: Acts xvi. 4--as in Acts xx. 28, where bishops are charged to rule the Church, each over his flock, wherein the Holy Ghost has placed him--as in 1 Cor. v. 1-5, where S. Paul, "in the name of our Lord Jesus Christ," excommunicates--as in 2 Cor. x. 6, where he sets forth his apostolic power--as in the Epistles to Titus and Timothy, where he sets them in authority, enjoins them to ordain priests in every city, and commands them to "reprove," or "rebuke." And all these powers S. Peter, of course, as one of the Twelve, had received in common with the rest. The limit to them would seem to lie in their being shared in common by twelve; as, for instance, universal mission dwelling in such a body must practically be determined and limited somehow to the different members of that body, or one would interfere with the other. But there is nothing in these powers which answers to the images of "the rock," on which the Church is built, the single "bearer of the keys," and "confirmer" of his brethren, which Christ had appropriated to one Apostle. In like manner, then, as our Lord fulfilled His promises to the Twelve, so did He those to S. Peter, and we find written the committal of an authority to him exactly answering to these images; an authority, which expresses the full legislative, judicial and executive power of the head, which can be executed by one alone at a time, and is of its own nature supreme, and responsible to none save God. It remained for our Lord to find an image setting forth all this as decisively as that of the Rock, the Bearer of the keys, and the Confirmer of his brethren.