Why Elijah?--"Why send Elijah?" asks the Prophet; and answers his own question thus: "Because he holds the keys of the authority to administer in all the ordinances of the Priesthood; and without the authority is given, the ordinances could not be administered in righteousness." In the same connection he states that "Elijah was the last prophet that held the keys of the Priesthood." [15] The Restorer's Mission.--Elijah's mission, as made known by modern revelation, represents the establishment of that condition of perfect unity referred to by Joseph the Seer, whose comment thereon is quoted in the third paragraph of this article. "Mormonism," as already explained, does not stand for one Gospel dispensation alone, but for all the Gospel dispensations, extending, like the links of a mighty chain, through the whole course of Time. The Final Dispensation, made effective by the keys of Elijah, will bring together and weld in one the parted links of this universal chain. The restitution of all things--the setting in order of the Lord's House, preparatory to his coming, such is the significance of the mission of Elijah, who turns the hearts of the fathers (in heaven) to the children (on earth), and the hearts of the children to the fathers. The Welding Link.--But these hearts must not only be turned; they must be bound together, and beat as one. That thought, no less than the other, was in the Prophet's mind when, from his place of retirement during a season of trouble, he wrote repeatedly to the Church regarding an all-important duty devolving upon its members. Said he: "The earth will be smitten with a curse unless there is a welding link of some kind or other, between the fathers and the children." And what is it? "It is the baptism for the dead. For we without them cannot be made perfect, neither can they without us be made perfect." [16] Without Unity, No Perfection.--Perfection is the great end in view; and without unity there can be no perfection. To bring about this great consummation, the Gospel was instituted, the Savior chosen, Earth created, and the human race placed upon this planet. Nothing imperfect can inherit the Divine Presence--the fulness of God's glory. This important lesson is taught by the principle of marriage--celestial marriage--the sealing of the sexes, not for time only, but for all eternity. "The man is not without the woman, nor the woman without the man, in the Lord." [17] United, they represent completeness, perfection, each being the complement of the other. Husband and wife, parent and child, the living and the dead, must be one, lest it be said of them at the celestial gates, as it was said at the gates of Verdun: "They shall not pass." The Latter-day Saints build temples and officiate therein, the living for the dead, not only to save them, but to bring them into that grand Order of Unity, so necessary to the perfection of God's work.