One of the fundamental principles underlying the doctrine of salvation for the dead, is that of the mutual dependance of the fathers and the children. Family lineage and the sequence of generations in each particular line of descent are facts, and cannot be changed {84} by death; on the other hand it is evident from the olden scriptures already cited, and attested by the equally sure word of modern revelation, that the family relationships of earth are recognized in the spirit world. Neither the children nor the fathers, neither progenitors nor descendants, can alone attain perfection; and the requisite co-operation is effected through baptism and related ordinances, administered to the living in behalf of the dead. In this way and through this work are the hearts of the fathers and those of the children turned toward each other. As the living children learn that without their ancestors they cannot attain a perfect status in the eternal world, their own faith will be strengthened and they will be willing to labor for the redemption and salvation of their dead. And the dead, learning through the preaching of the Gospel in their world, that they are dependent upon their descendants as vicarious saviors, will turn with loving faith and prayerful effort toward their children yet living. This uniting of the interests of fathers and children is a part of the necessary preparation for the yet future advent of the Christ as ruling King and Lord of earth. Joseph Smith thus taught: "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, upon some subject or other, and behold what is that subject? It is the baptism for the dead. For we without them cannot be made perfect; neither can they without us be made perfect."[46] {85} The Church today cites as authority for its administration of ordinances in behalf of the dead, the special bestowal of this power and office through the ministry of Elijah; and furthermore, the Church holds that the giving of that power marked the fulfilment of Malachi's portentous prediction. There appears an element of particular fitness in the fact that the minister through whom this great work has been inaugurated in the present dispensation, is none other than Elijah,--who, not having passed the portals of death, held a peculiar and special relation to both the dead and the living. As to the fidelity with which the Church has served under this special commission, the temples it has reared with such sacrifice and self-denial on the part of its devoted adherents, and the ordinance work already performed therein, are sufficient proof.