Why was Jesus uniquely qualified to be the Savior? Why is there “no other way … man can be saved, only in and through Christ” (Alma 38:9)?
According to Jeffrey Marsh:
First, he alone was uniquely obedient to the way of our Father in Heaven (Hebrews 4:15; 9:14; 2 Corinthians 5:21; 1 Peter 1:19; Mosiah 15:5; D&C 20:22)
Second, he was foreordained, chosen from the beginning (1 Peter 1:20; Revelation 13:8; Ether 3:14; Moses 4:2; Abraham 3:27)
Third, as the Only Begotten Son of God, he inherited God’s power over death (John 10;17-18; 2 Nephi 2:8; Mormon 7:5) He could lay down his life and take it up again. No one else has had power to do that.
Fourth, his atonement is universal. It affects all mankind (2 Nephi 9:7) and all of the Father’s creations (D&C 76:40-43).
[W. Jeffrey Marsh, His Final Hours, p. 13] [See 2 Nephi 31:21; Mosiah 3:17; Helaman 5:9; Moroni 7:32]
The Lord Redeems His Covenant Children
Alma 1 -- Alma 44