The Three Nephites were transfigured and translated.
Transfiguration, which is mentioned in 3 Nephi 28:13–17, is “the condition of persons who are temporarily changed in appearance and nature—that is, lifted to a higher spiritual level—so that they can endure the presence and glory of heavenly beings” (Guide to the Scriptures, “Transfiguration,” scriptures.lds.org; see also D&C 67:11; Moses 1:11). The scriptures tell of people who have been transfigured, including Moses (see Moses 1:9–11); Jesus Christ, Peter, James, and John (see Matthew 17:1–8); and Joseph Smith (see Joseph Smith—History 1:14–20).
Translated beings are “persons who are changed so that they do not experience pain or death until their resurrection to immortality” (Guide to the Scriptures, “Translated Beings,” scriptures.lds.org; see also 3 Nephi 28:7–9, 20–22, 37–40). Their purpose is to bring souls to Christ (see 3 Nephi 28:9). The scriptures contain accounts of people who have been translated, including Enoch (see Genesis 5:24; Hebrews 11:5), Moses (see Alma 45:19), Elijah (see 2 Kings 2:11), and John the Beloved (see John 21:22–23; D&C 7).
“We each have so much need for his help as we seek to learn gospel truths and then live them, as we seek his help in the major decisions of our lives, decisions involving schooling, marriage, employment, place of residence, raising our families, serving with each other in the work of the Lord, and seeking his forgiveness and continual guidance and protection in all we do. Our list of needs is long and real and heartfelt. …
“After a lifetime of prayers, I know of the love and power and strength that comes from honest and heartfelt prayer. I know of the readiness of our Father to assist us in our mortal experience, to teach us, to lead us, to guide us. Thus, with great love, our Savior has said, ‘What I say unto one I say unto all; pray always.’ (D&C 93:49.)” (Spencer W. Kimball, “Pray Always,” Ensign, Oct. 1981, 3, 6).