Atonement of Jesus Christ
Mormonism teaches that the Jesus Christ’s atonement is the central doctrine of the great plan of life and salvation. On one occasion the Prophet Joseph Smith was asked the question "What are the fundamental principles of your religion?" The Prophet's answer to the question was: "the fundamental principles of our religion are the testimony of the Apostles and the Prophets, concerning Jesus Christ, that He died, was buried, and rose again the third day, and ascended into heaven; and all other things which pertain to our religion are only appendages to it ..." (Teachings of the Prophet Joseph Smith, p. 121).
Truly, Jesus’ mission, that culminated in His infinite sacrifice, the Atonement, is the most important message of Mormonism.
The Atonement, which is the greatest in the history of the world, was accomplished through Jesus’ sufferings in the Garden of Gethsemane and on the cross. We can’t fully understand how Jesus suffered for our sins but the scriptures tell us that in the Garden of Gethsemane, the weight of mankind’s sins caused Him to feel such agony that He bled from every pore (Luke 22:39–44). Later, as He hung upon the cross, Jesus willingly suffered a painful death inflicted by one of the cruelest methods that men ever devised. The same Savior tells us about that experience: For behold, I . . . have suffered these things for all, that they might not suffer . . . even as I. [Doctrine and Covenants 19:16–17] Jesus Christ was the only being who could have done such infinite sacrifice to atone for our sins. Jesus did his part, but in order to make His Atonement fully beneficial in our individual lives, we must do certain things. First, we need to have faith in Christ; second, we need to repent of our sins; third, we need to be baptized by someone who has the proper priesthood authority; fourth, we need to receive the Holy Ghost by the laying on of the hands (again by someone who has the proper priesthood authority); and finally, we need to obey God's commandments until the end of our days on the earth. If we do these things, then the benefits of the Atonement can reach our individual lives and allow us to return to live with Him and our Heavenly Father forever. According to Mormon doctrine we are saved by grace, but only after we do all we can to obey God’s commandments.
The Garden of Gethsemane and the Cross
The literal meaning of the word "Atonement" is at-one-ment, meaning the act of unifying or bringing together what has been separated. According to the teachings of the Church of Jesus Christ of Latter-day Saint, the Atonement of Jesus Christ was necessary because of the transgression, or fall, of Adam, which brought death into the world when Adam and his wife, Eve, partook of the fruit of the tree of knowledge of good and evil (see Gen. 2:9; 3:1-24).
Frequently, when Christians talk about the atonement, including many member of the Church of Jesus Christ of Latter-day Saints, they emphasize the physical aspects of that great sacrifice. We may speak about the crown of thorns that was placed upon the head of Christ, or about the scourging he underwent by the soldiers and the pains he suffered when nails were driven into his hands and into his feet. Surely, these were painful happenings and they are important features of the atonement. However, there is also a more spiritual dimension in the atonement.
The scriptures say that when in the Garden of Gethsemane, Jesus began to be sorrowful and very heavy. He said to His apostles: “My soul is exceedingly sorrowful, unto death” (Mark 14:34). The same Christ, when already a resurrected being, revealed to Joseph Smith a few more details about His suffering in Gethsemane: “"For behold, I, God, have suffered these things for all men, that they might not suffer if they would repent. But if they would not repent they must suffer even as I; which suffering caused myself, even God, the greatest of all, to tremble because of pain, and to bleed at every pore, and to suffer both body and spirit-and would that I might not drink the bitter cup, and shrink-nevertheless, glory be to the Father, and I partook and finished my preparations unto the children of men." (Doctrine and Covenant 19:16-19).
The experience of the “bitter cup” in Gethsemane affected the Savior profoundly and Latter-day Saints scriptures emphasize this aspect of the atonement. Both Gethsemane and the Cross were part of the infinite sacrifice of the Savior, but what happened in Gethsemane need to be better understood.
For a better understanding of this sacred event you may want to read:
Skinner, Andrew C. Gethsemane. Salt Lake City: Deseret Book, 2002.