What does it mean that the “proud … and all that do wickedly” will be burned and left without either root or branch? (3 Nephi 25:1). This phrase refers to the theme of 3 Nephi 25. Consider your roots to be your parents or ancestors and your branches to be your children or posterity. To be united with our roots and branches, we must receive temple ordinances. The Lord said He would send Elijah before the Second Coming to restore priesthood keys that would allow families to be complete—both roots and branches. In 1836 the sealing power was restored, and it provides the way for families to be eternally linked (see D&C 110:14–16; 128:18). However, the proud and the wicked will be burned up and left without either root (ancestors) or branch (posterity), leaving them cut off from their family and the sealing blessings.
Elder Jeffrey R. Holland spoke of this idea: “Elijah restored the sealing powers whereby ordinances that were sealed on earth were also sealed in heaven. … Without that link no family ties would exist in the eternities, and indeed the family of man would have been left in eternity with ‘neither root [ancestors] nor branch [descendants]’” (Christ and the New Covenant [1997], 297–98).