Harold B. Lee taught,

“Now keep in mind this: that when the full measure of Elijah’s mission is understood, that the hearts of the children will be turned to the fathers, and the fathers to the children. It applies just as much on this side of the veil as it does on the other side of the veil. If we neglect our families here in having family home night and we fail in our responsibilities here, how could we feel that we are doing our full duty in turning the hearts of our children to their fathers.

“How would heaven be if we lost some of those we love through our own neglect? The blessings in heaven won’t be ours until we have done everything we can to save those whom the Lord has sent through our lineage. So, the hearts of you fathers and mothers must be turned to your children right now, if you have the true spirit of Elijah, and not think that it applies merely to those who are beyond the veil. Let your hearts be turned to your children, and teach your children; but you must do it when they are young enough to be properly schooled. If you are neglecting your family home evening, you are neglecting the beginning of the mission of Elijah just as certainly as if you were neglecting your genealogy research work.” 

Harold B. Lee, Priesthood Genealogy Seminar, 1973