QUOTES By Leaders of
The Church of Jesus Christ of Latter-day Saints
It remains the responsibility of each individual to know his kindred dead... Even if the work is done, then it is still each person's responsibility to study and become acquainted with his ancestors.  --- Joseph F. Smith: 
"It doesn't matter whether your computer is able to compile all the family group sheets for everyone that ever lived on the earth, it remains the responsibility of each individual to know his kindred dead . . .
Even if the work is done, then it is still each person's responsibility to study and become acquainted with his ancestors."
 Joseph Field Smith, Hearts Turned to the Fathers, p. 184
"If temple ordinances are an essential part of the restored gospel, and I testify they are, then we must provide the means by which they can be accomplished. All of our vast family history endeavor is directed to temple work. There is no other purpose for it." -- Gordon B. Hinckley
"The greatest responsibility in this world that God has laid upon us is to seek after our dead." -- Joseph Smith Jr.
"Elijah's coming was to teach us, the living, that the dead may be saved and that we are to be instruments in the hands of God in helping to bring this about." -- Mark E. Petersen
"We have a work to do just as important in its sphere as the Savior's work was in its sphere. Our fathers cannot be made perfect without us; we cannot be made perfect without them. They have done their work and now sleep. We are now called upon to do ours; which is to be the greatest work man ever performed on the earth. Millions of our fellow creatures who have lived upon the earth and died without a knowledge of the Gospel must be officiated for in order that they may inherit eternal life (that is, all that would have received the Gospel). And we are called upon to enter into this work." 18:213.
--- Brigham Young:
"...When you see Zion redeemed and built up-when you see the people performing the ordinances of salvation for themselves and for others, (and they will hereafter,) you will see simply this (but I have not time this morning to tell you, only a little part of it): About the time that the temples of the Lord will be built and Zion is established-pretty nigh this time, you will see (those who are faithful enough,) the first you know, there will be strangers in your midst, walking with you, talking with you; they will enter into your houses and eat and drink with you, go to meeting with you, and begin to open your minds, as the Savior did the two disciples who walked out in the country in the days of old.
"About the time the temples are ready, the strangers will be along and will converse with you, and will inquire of you, probably, if you understand the resurrection of the dead. You might say you have heard and read a great deal about it, but you do not properly understand it; and they will then open your minds and tell you the principles of the resurrection of the dead and how to save your friends; they will point out Scriptures in the Old and New Testament, in the Book of Mormon, and other revelations of God, saying, "Don't you recollect reading so and so, that saviors should come up on Mount Zion?" etc., and they will expound the Scriptures to you. You have got your temples ready; now go forth and be baptized for those good people. There are your father and your mother-your ancestors for many generations back-the people that have lived upon the face of the earth since the Priesthood was taken away, thousands and millions of them, who have lived according to the best light and knowledge in their possession. They will expound the Scriptures to you, and open your minds, and teach you of the
resurrection of the just and the unjust of the doctrine of salvation, they will use the keys of the holy Priesthood, and unlock the door of knowledge, to let you look into the palace of truth. You will exclaim, That is all plain: why did I not understand it before? and you will begin to feel your heart burn within you, as they walk and talk with you." 6:294-295.
--- Brigham Young
"If they knew how great this is they would be beating down the doors to get into the family history centers" 1998 FH Broadcast