The name Lucifer (meaning “light bearer”) is used in the scriptures only three times: in the Isaiah reference just cited (see Isaiah 14:12 and 2 Nephi 24:12), plus a third time in modern scripture:
And this we saw also, and bear record, that an angel of God who was in authority in the presence of God, who rebelled against the Only Begotten Son whom the Father loved and who was in the bosom of the Father, was thrust down from the presence of God and the Son,
And was called Perdition, for the heavens wept over him—he was Lucifer, a son of the morning.
And we beheld, and lo, he is fallen! is fallen, even a son of the morning! (D&C 76:25–27; see also the references in 2 Nephi 2:17; Moses 4:3–4)
The fall of Lucifer, the devil, from the premortal courts of heaven signifies his ultimate downfall—along with all worldly institutions of pride and evil that follow his pattern of wickedness—during the final scenes of the earth’s history. We can profitably apply this lesson to our own lives by meticulously avoiding the example of Lucifer.