Second, that the Lamanites might come to a knowledge of their fathers.
Third, that the Lamanites might know the promises of the Lord, both to their fathers and to themselves.
Mormon also left upon record his testimony as to why the book which bears his name was written, and why it would be preserved and come forth in the last days. In his own book, by which I mean that book in which he wrote the things which he saw in his own day, Mormon says:
Now these things are written unto the remnant of the house of Jacob; * * * and behold, they shall come forth according to the commandment of the Lord, when he shall see fit, in his wisdom. And behold, they shall go unto the unbelieving of the Jews; and for this intent shall they go—that they may be persuaded that Jesus is the Christ, the Son of the living God; that the Father may bring about, through his most Beloved, his great and eternal purpose, in restoring the Jews, or all the house of Israel, to the land of their inheritance, which the Lord their God hath given them, unto the fulfilling of his covenant; and also that the seed of this people[[2]] may more fully believe his gospel, which shall go forth unto them from the Gentiles.[[3]]
Again, this same writer, Mormon, addressing himself to the remnants of the Lamanites to whom, in the future, his record would come, says:
"Know ye that ye must come to a knowledge of your fathers, and repent of all your sins and iniquities, and believe in Jesus Christ, that he is the Son of God, and that he was slain by the Jews, and by the power of the Father he hath risen again, whereby he hath gained the victory over the grave; and also in him is the sting of death swallowed up. And he bringeth to pass the resurrection of the dead, whereby man must be raised to stand before his judgment-seat. And he hath brought to pass the redemption of the world, whereby he that is found guiltless before him at the judgment day hath it given unto him to dwell in the presence of God in his Kingdom, to sing ceaseless praises with the choirs above, unto the Father, and unto the Son, and unto the Holy Ghost, which are one God, in a state of happiness which hath no end. Therefore repent, and be baptized in the name of Jesus, and lay hold upon the gospel of Christ, which shall be set before you, not only in this record but also in the record which shall come unto the Gentiles from the Jews,[[4]] which record shall come from the Gentiles unto you. For behold, this[[5]] is written for the intent that ye may believe that;[[6]] and if ye believe that ye will believe this also; and if ye believe this, ye will know concerning your fathers, and also the marvelous works which were wrought by the power of God among them. And ye will also know that ye are a remnant of the seed of Jacob; therefore ye are numbered among the people of the first covenant." (Mormon 7:5-10.)
This passage is important because that in addition to assigning substantially the same reasons for the writing and coming forth of the Book of Mormon, as those before enumerated, it brings out the fact that the Book of Mormon was written also to be a witness for the Bible, to prove it true, for the language in the above passage makes plain reference to the Bible, the "record" which comes from the Jews to the Gentiles, and from the Gentiles to the remnant of the Lamanites to whom Mormon makes reference.
This is also the testimony of the first Nephi. In vision he saw the advent of the Gentile races upon the western hemisphere. He saw their victories over the remnant of the seed of his brethren, the Lamanites. He then proceeds:
And I beheld the Spirit of the Lord, that it was upon the Gentiles, and they did prosper and obtain the land for their inheritance; and I beheld that they were white, and exceeding fair and beautiful, like unto my people before they were slain. And it came to pass that I, Nephi, beheld that the Gentiles who had gone forth out of captivity did humble themselves before the Lord; and the power of the Lord was with them. And I beheld that their mother Gentiles were gathered together upon the waters, and upon the land also, to battle against them. And I beheld that the power of God was with them, and also that the wrath of God was upon all those that were gathered together against them to battle. And I, Nephi, beheld that the Gentiles that had gone out of captivity were delivered by the power of God out of the hands of all other nations. And it came to pass that I, Nephi, beheld that they did prosper in the land; and I beheld a book, and it was carried forth among them. And the angel said unto me: Knowest thou the meaning of the book? And I said unto him: I know not. And he said: Behold it proceedeth out of the mouth of a Jew. And I, Nephi, beheld it; and he said unto me: The book that thou beholdest, is a record of the Jews, which contains the covenants of the Lord, which he hath made unto the house of Israel and it also containeth many of the prophecies of the holy prophets; and it is a record like unto the engravings which are upon the plates of brass,[[7]] save there are not so many; nevertheless, they contain the covenants of the Lord, which he hath made unto the house of Israel; wherefore, they are of great worth unto the Gentiles.
And the angel of the Lord said unto me: Thou hast beheld that the book proceeded forth from the mouth of a Jew; and when it proceeded forth from the mouth of a Jew it contained the plainness of the gospel of the Lord, of whom the twelve apostles bear record; and they bear record according to the truth which is in the Lamb of God. Wherefore, these things go forth from the Jews in purity unto the Gentiles, according to the truth which is in God. And after they go forth by the hand of the twelve apostles of the Lamb, from the Jews unto the Gentiles, thou seest the foundation of a great and abominable church, which is most abominable above all other churches; for behold, they have taken away from the gospel of the Lamb many parts which are plain and most precious; and also many covenants of the Lord have they taken away. And all this have they done that they might pervert the right ways of the Lord, that they might blind the eyes and harden the hearts of the children of men. Wherefore, thou seest that after the book had gone forth through the hands of the great and abominable church, that there are many plain and precious things taken away from the book, which is the book of the Lamb of God. And after these plain and precious things were taken away it goeth forth unto all the nations of the Gentiles; and after it goeth forth unto all the nations of the Gentiles, yea, even across the many waters which thou hast seen with the Gentiles which have gone forth out of captivity, thou seest—because of the many plain and precious things which have been taken out of the book, which were plain unto the understanding of the children of men, according to the plainness which is in the Lamb of God—because of these things which are taken away out of the gospel of the Lamb, an exceeding great many do stumble, yea, insomuch that Satan hath great power over them. * * * And it came to pass that the angel of the Lord spoke unto me, saying: Behold, saith the Lamb of God, after I have visited the remnant of the house of Israel—and this remnant of whom I speak is the seed of thy father[[8]]mm after I have visited them in judgment, and smitten them by the hand of the Gentiles, and after the Gentiles do stumble exceedingly, because of the most plain and precious parts of the gospel of the Lamb which have been kept back by that abominable church, which is the mother of harlots, saith the Lamb—I will be merciful unto the Gentiles in that day, insomuch that I will bring forth unto them, in mine own power, much of my gospel, which shall be plain and precious saith the Lamb.
For, behold, saith the Lamb: I will manifest myself unto thy seed, [[9]] that they shall write many things which I shall minister unto them, which shall be plain and precious; and after thy seed shall be destroyed, and dwindle in unbelief, and also the seed of thy brethren, behold, these things shall be hid up, to come forth unto the Gentiles, by the gift and power of the Lamb.
And in them shall be written my gospel, saith the Lamb, and my rock and my salvation. * * * And it came to pass that I beheld the remnant of the seed of my brethren, and also the book of the Lamb of God, which had proceeded forth from the mouth of the Jew, that it came forth from the Gentiles unto the remnant of the seed of my brethren. And after it had come forth unto them I beheld other books, which came forth by the power of the Lamb, from the Gentiles unto them, unto the convincing of the Gentiles and the remnant of the seed of my brethren, and also the Jews who were scattered upon all the face of the earth, that the records of the prophets and of the twelve apostles of the Lamb are true. And the angel spake unto me, saying: These last records which thou hast seen among the Gentiles, shall establish the truth of the first, which are of the twelve apostles of Lamb, and shall make known the plain and precious things which have been taken away from them; and shall make known to all kindreds, tongues, and people, that the Lamb of God is the Son of the Eternal Father, and the Savior of the world; and that all men must come unto him, or they cannot be saved. And they must come according to the words which shall be established by the mouth of the Lamb; and the words of the Lamb shall be made known in the records of thy seed, as well as in the records of the twelve apostles of the Lamb; wherefore they both shall be established in one; for there is one God and one Shepherd over all the earth.[[10]]
The reference here made to "the book of the Lamb of God, which had proceeded forth from the mouth of a Jew," is beyond all question the Bible; while the "other books," which came forth by the power of the Lamb, from the Gentiles unto the remnant of Lehi's descendants, and which records are to establish the truth of the first records, or the Bible, is in plain allusion to the Book of Mormon and other scriptures to be brought forth by the power of God in the last days.