The apostolic office in its very nature, is a proselyting office. When an apostle presides, he, like the high priest, the seventy, the elder, or the bishop, presides because of the high priesthood which has been conferred upon him; and furthermore because he has been called upon so to do by the acknowledged head of the Church. (Doctrine and Covenants, section 107:23-33.) And so with the high priest who has been called to officiate in the First Presidency, in which case he is "accounted equal" with the President of the Church in holding the keys of the Presidency (section 90:6) as long as the President remains. When he dies, the calling of his counselors ends, and the responsibility of Presidency falls upon the quorum of Twelve Apostles, because they hold the Holy Melchizedek Priesthood and are {218} the next quorum in authority. (Doctrine and Covenants, section 107:24.) It is not the apostleship (Doctrine and Covenants section 107), but the priesthood and the calling by proper authority which enables any person to preside. Every man holding the Holy Melchizedek Priesthood may act in any capacity and do all things that such priesthood holds, provided he is called upon by proper authority to so officiate; but he would have no right to depart from the limitations of his office, unless he is specially called upon by one whose calling, from those over him up to the head, would clearly authorize him to give such instructions. It is always to be presumed, also, that order will be observed, and that the servants of the Lord will not depart from that order, and call upon men to do things which the law of the priesthood and the nature of their office do not authorize, unless there is special occasion for it. The Lord says that all things are governed by law. (See Doctrine and Covenants, section 88:42.) It is not consistent, for instance, to imagine that the Lord would call upon a deacon to baptize. Witness the calling, on February 14, 1835, of David Whitmer and Martin Harris, both high priests, by the Prophet Joseph, in conformity with prior revelation from God (See Doctrine and Covenants, section 18) to "search out the Twelve." They chose the Twelve, ordained and set them apart for their exalted callings, because they were called upon by the prophet of God who had been instructed of the Lord, and also because these men held the necessary authority of the Priesthood, which authority was exercised, in this case as it should be in all cases, upon proper calling. The Doctrine and Covenants makes it very clear that while each officer in the Church has a right to officiate in his own standing, "the Melchizedek Priesthood holds the right of presidency, and has power and authority over all the offices in the Church in all ages of the world, to administer in spiritual {219} things." (Doctrine and Covenants, section 107:8.) Further, in the same revelation verses 65 and 66, we are told: