1. The Lord declared that the people in this dispensation would receive His word through Joseph Smith.

D&C 5:10 This generation shall have my word through you

“I’ve listed the most prolific scriptural producers besides Joseph Smith:

Mormon	338 pages
Moses	308 pages
Jeremiah	170 pages
Paul	122 pages
Nephi	117 pages
Luke	103 pages
Unknown writer of Chronicles	86 pages
Isaiah	81 pages
Unknown writer of 1 and 2 Samuel	81 pages
John	74 pages

“Now consider Joseph Smith’s accomplishments in bringing forth scripture:

Book of Mormon	531 pages
Doctrine and Covenants 1-134	280 pages
Pearl of Great Price	58 pages
Joseph Smith Translation	30 pages

“These 10 most prolific scriptural producers authored a total of 1,480 pages. Joseph Smith alone was responsible for 900. His total pages equal nearly 61 percent of the total pages of the other top 10 producers, and he is responsible for nearly three times as many pages as either of the two next highest scriptural producers, Mormon and Moses. Before Joseph Smith, the world had only the 1,590 pages of the Bible; through this one man, the Lord increased our scriptural library by more than half.

“Yet counting pages serves only to indicate how prodigious the Prophet Joseph Smith’s efforts were; what really matters is the content of the new scriptures that he gave to the world. Joseph Smith gave us new or expanded knowledge about a full spectrum of gospel topics:

• The nature of the Godhead
• The role and functions of the Holy Ghost
• The nature of intelligences
• The premortal existence
• The Council in Heaven
• Jesus Christ’s and Lucifer’s premortal roles
• The Creation, the Fall, and the Atonement
• Family and parental responsibilities
• Priesthood keys, organization, and ordinances
• The laws of consecration and stewardship
• The temple endowment and temple sealings
• Work for the dead
• Spirit paradise and spirit prison
• The Second Coming of Jesus Christ
• The three degrees of glory and outer darkness

“In addition to canonized scripture, Joseph Smith also gave us many journals, sermons, lectures, and histories that provide additional gospel teachings and knowledge of the Lord’s work in the latter days. As the Lord Jesus Christ said, ‘This generation shall have my word through you [the Prophet Joseph Smith]’ (D&C 5:10).

“In fact, it could be truly said that the depth and consistency of the gospel’s saving doctrines can be traced to the Prophet Joseph Smith’s accomplishment in bringing forth new scriptures. ‘I never told you I was perfect,’ Joseph Smith said, ‘but there is no error in the revelations which I have taught’ (History of the Church, 6:366).” (Gerald N Lund, “A Prophet for the Fulness of Times,” Ensign, Jan. 1997, 52-53)

2. Many ancient and latter-day scriptures have come through Joseph Smith.

See This generation shall have my word through you by Elder Bruce R McConkie

See Translation and Historicity of the Book of Abraham. This Gospel Topics essay discusses the book of Abraham, addressing questions that have been raised about the relationship between the papyri Joseph Smith obtained and the text we have today.

D&C 35:20 Thou shalt write for him

“To Sidney He gave a special command that he should write for Joseph. The Lord made known to Sidney what Joseph already understood—that the Scriptures should be given, even as they were in God’s own bosom, to the salvation of His elect. And soon after this time, Joseph began a new translation of the scriptures. While he labored, many truths, buried through scores of ages, were brought forth to his understanding, and he saw in their purity and holiness all the doings of God among His children, from the days of Adam unto the birth of our Lord and Savior.” (George Q Cannon, Life of Joseph Smith, pp. 83–84.)

3. Plain and precious doctrines of the gospel have been restored through Joseph Smith.

See Revelations in Context: Joseph Smith’s Bible Translation. This article discusses the translation process and the ways in which different sections of the Doctrine and Covenants relate to the Bible translation.

See Old Testament Revision 2. This page from the Joseph Smith Papers website introduces Joseph Smith’s Bible translation.

See  Plain and Precious Truths Restored. A careful examination of the Book of Mormon reveals many significant doctrines not found in the Bible.

See The Joseph Smith Translation: “Plain and Precious Things” Restored. Through the Prophet Joseph Smith’s inspired revisions of the King James Version of the Bible, we receive truths essential to a full understanding of the gospel.