Taught by Sue G.
After Alma finishes his discourse to the Zoramites, Amulek delivers a powerful sermon in which he testifies of the coming Savior and His atoning sacrifices. He testifies that the entire law of Moses points toward the sacrifice of the Messiah, the son of God, and that the eternal plan of redemption is based on faith and repentance. He teaches that this life is the time to prepare to meet God and counsels the people to work out their salvation with fear and trembling.
Alma declares that a mans garments must be washed white or he cannot be saved, and Amulek in this chapter writes that a mans garments must be made white through the blood of the Lamb.
Modern scholars such as Goodenough, have identified the white garment as being of particular importance to the Jews. Hugh Nibley stated that "God himself may be represented in the earliest Jewish art as one of these men clothed in white". This image wasn't even known to exist until 1958. There are three men in white, and a single figure, the prophet in white. In symbol for the chosen prophet, an emissary from God is always the white robe, which is reserved for heavenly beings. This concedes perfectly with testimonies in the Book of Mormon that the righteous will be "clothed with purity, yea, even with the robe of righteousness". (2 Nephi 9:14)
*Some information taken from "The essential Book of Mormon companion"