Nephi makes an interesting addition to his earlier record of the revelation of Christ's baptism. In the earlier 1 Nephi account, he attributes his initial understanding to his father, Lehi. Then, he adds from his own vision that he has seen "the prophet who should prepare the way before him. And the Lamb of God went forth and was baptized of him; and after he was baptized, I beheld the heavens open, and the Holy Ghost come down out of heaven and abide upon him in the form of a dove." (1 Nephi 11: 27.)
We have a record of this from the Gospels. What we have never had before is what Nephi now adds to the account: "And I heard a voice from the Father, saying: Yea, the words of my Beloved are true and faithful. He that endureth to the end, the same shall be saved." (2 Nephi 31:15.) Nephi has been holding back. But here he lets us get another peak behind the veil. Not only has his visionary experiences made him acquainted with the apostles of the Lamb, and the history of the world, but it has also included an audience with the Father. This is important because it shows Nephi's progression. The Holy Ghost brings us to Christ. Christ brings us to the Father. The fact that Nephi has had an audience or heard the voice of the Father, with no greater elaboration, powerfully suggests Nephi has been blessed with all that mankind can receive in mortality (i.e., the promise of eternal life).
In both Nephi's and his father's vision of the "tree of life," Nephi was one of those who ate from the "fruit" which was "most desirable" over everything else. These multiple visionary confirmations of Nephi's ultimate exaltation were also reconfirmed by the voice of the angel-tutor Nephi had as his guide. The angel said to Nephi: "blessed art thou, Nephi, because thou believest in the Son of the most high God; wherefore, thou shalt behold the things which thou hast desired." (1 Nephi 11: 6.) Nephi most certainly had his calling and election made sure. This in part accounts for Nephi's desire to see others do the same.