We should dress in such a way that we might comfortably attend a sacrament meeting or a gathering that is proper and dignified. Within the temple, all are dressed in spotless white to remind us that God is to have a pure people. 18 Nationality, language, or position in the Church are of secondary significance. In that democracy of dress, all sit side by side and are considered equal in the eyes of our Maker. 19 Brides and grooms enter the temple to be married for time and all eternity.
Grooms also dress in white.
And brethren who come to witness weddings do not wear tuxedos. Wearing the temple garment has deep symbolic significance. It represents a continuing commitment. Just as the Savior exemplified the need to endure to the end, we wear the garment faithfully as part of the enduring armor of God. Thus we demonstrate our faith in Him and in His eternal covenants with us.