The Sealed Portion—The Final Testament of Jesus Christ is the sealed part of the gold plates from which the Book of Mormon was translated and published in 1830. If one does not accept the Book of Mormon for what it claims to be, then it is likely that one will not accept The Sealed Portion for what it is; and therefore, this book is not where one should start his or her search for truth in this Marvelous Work and a Wonder.
One who does not believe in scripture will enjoy HUMAN REALITY—Who We Are and Why We Exist!, and should start his or her search with that book.
The Bible was created by men, who, throughout history, wanted to present a philosophical idea of our relationship with a God as our Creator. The Bible has been the cause of much war and misery since its inception. Most of the world's misery is caused by those who are misled by the Bible's teachings and also by those who interpret and teach their followers that it is the ultimate “word of God.” It is NOT the word of God. It is the word of men.
To counter the Bible without alienating those who believe in it, Advanced Humans interceded and prepared the Book of Mormon.
However, the Book of Mormon does not contain “even a hundredth part of the things which Jesus did truly teach unto the people.” (See BOM, 3 Nephi 26:6)
It was meant to “try [the reader’s] faith, and if it shall so be that they shall believe these things then shall the greater things be made manifest unto them.” (3 Nephi 26:9)
The Sealed Portion contains these “greater things”:
Behold, when ye shall rend that veil of unbelief which doth cause you to remain in your awful state of wickedness, and hardness of heart, and blindness of mind, then shall the great and marvelous things which have been hid up from the foundation of
the world from you -- yea, when ye shall call upon the Father in my name, with a broken heart and a contrite spirit, then shall ye know that the Father hath remembered the covenant which he made unto your fathers. (Ether 4:15)