Surely the Lord God will do nothing, but he revealeth his secret unto his servants the prophets (Amos 3:7).
If God himself told His prophet something that the whole world needed to hear, but that prophet lived long ago or far away, how could we get the message? Answer: The prophets carefully wrote it down for us; we can find it in books and other writings called scriptures. The scriptures are the word of God revealed to prophets.
Hundreds of years before Jesus Christ was born, many Old Testament prophets promised the people that a Messiah (Savior) would come. Isaiah prophesied that a Child would be born (see Isa. 9:6). Micah said He would be born in Bethlehem (see Micah 5:2). Zechariah knew that Jesus Christ, the Messiah, would be betrayed for thirty pieces of silver (see Zech. 11:12–13).
The New Testament was written by prophets who lived about the same time as Jesus Christ. Many heard Him teach, saw Him crucified, and talked with Him after His resurrection. They knew that He was the Son of God (see Matt. 16:16).
Book of Mormon prophets wrote a long record of their people who came to the Americas. They also wrote about Jesus Christ. Nephi saw much of the Savior’s life in a vision (see 1 Ne. 11:13–33). Alma prophesied that Jesus Christ’s mother’s name would be Mary (see Alma 7:10). Samuel the Lamanite prophesied that a new star would shine at Christ’s birth (see Hel. 14:2, 5). When the Savior visited the Nephites, the prophets wrote all that they could about what He taught them (see 3 Nephi 17). They wrote so that they could share it with us.
After Joseph Smith translated the Book of Mormon, the Lord gave him other revelations, which are now included in the Doctrine and Covenants and the Pearl of Great Price. These books contain important information about Jesus Christ and powerful testimonies that He lives (see D&C 76:22–24).
The Lord tells His prophets many things that we need to know—how to live, how to repent, what will happen in the future. But the most important thing the scriptures teach us is that Jesus is the Christ. Every prophet bears testimony of Him.