Behold, he created Adam, and by Adam came the fall of man. And because of the fall of man came Jesus Christ, even the Father and the Son; and because of Jesus Christ came the redemption of man.
And because of the redemption of man, which came by Jesus Christ, they are brought back into the presence of the Lord; yea, this is wherein all men are redeemed, because the death of Christ bringeth to pass the resurrection, which bringeth to pass a redemption from an endless sleep, from which sleep all men shall be awakened by the power of God when the trump shall sound; and they shall come forth, both small and great, and all shall stand before his bar, being redeemed and loosed from this eternal band of death, which death is a temporal death.
Now Alma said unto him: This is the thing which I was about to explain. Now we see that Adam did fall by the partaking of the forbidden fruit, according to the word of God; and thus we see, that by his fall, all mankind became a lost and fallen people.
And now behold, I say unto you that if it had been possible for Adam to have partaken of the fruit of the tree of life at that time, there would have been no death, and the word would have been void, making God a liar, for he said: If thou eat thou shalt surely die.
And we see that death comes upon mankind, yea, the death which has been spoken of by Amulek, which is the temporal death; nevertheless there was a space granted unto man in which he might repent; therefore this life became a probationary state; a time to prepare to meet God; a time to prepare for that endless state which has been spoken of by us, which is after the resurrection of the dead.
And he said unto them: Because that Adam fell, we are; and by his fall came death; and we are made partakers of misery and woe.
Joseph Fielding Smith
The Lord pronounced the earth good when it was finished. Everything upon its face was called good. There was no death in the earth before the fall of Adam. I do not care what the scientists say in regard to dinosaurs and other creatures upon the earth millions of years ago, that lived and died and fought and struggled for existence. When the earth was created and was declared good, peace was upon its face among all its creatures. Strife and wickedness were not found here, neither was there any corruption….
All life in the sea, the air, on the earth, was without death. Animals were not dying. Things were not changing as we find them changing in this mortal existence, for mortality had not come. Today we are living in a world of change because we are living under very different conditions from those which prevailed in the beginning and before the fall of man. 1
“Some may regret that our first parents sinned. This is nonsense. If we had been there, and they had not sinned, we would have sinned. I will not blame Adam or Eve. Why? Because it was necessary that sin should enter into the world; no man could ever understand the principle of exaltation without its opposite; no one could ever receive an exaltation without being acquainted with its opposite. How did Adam and Eve sin? Did they come out in direct opposition to God and to his government? No. But they transgressed a command of the Lord, and through that transgression sin came into the world. The Lord knew they would do this, and he had designed that they should” 2
Bible Dictionary: Fall of Adam
The process by which mankind became mortal on this earth. The event is recorded in Gen. 2, 3, 4; and Moses 3, 4. The fall of Adam is one of the most important occurrences in the history of man. Before the fall, Adam and Eve had physical bodies but no blood. There were no sin, no death, and no children among any of the earthly creations. With the eating of the “forbidden fruit,” Adam and Eve became mortal, sin entered, blood formed in their bodies, and death became a part of life. Adam became the “first flesh” upon the earth (Moses 3:7), meaning that he and Eve were the first to become mortal. After Adam fell, the whole creation fell and became mortal. Adam’s fall brought both physical and spiritual death into the world upon all mankind (Hel. 14:16–17).
The fall was no surprise to the Lord. It was a necessary step in the progress of man, and provisions for a Savior had been made even before the fall had occurred. Jesus Christ came to atone for the fall of Adam and also for man’s individual sins.
Latter-day revelation supports the biblical account of the fall, showing that it was a historical event that literally occurred in the history of man. Many points in latter-day revelation are also clarified that are not discernible from the Bible. Among other things it makes clear that the fall is a blessing, and that Adam and Eve should be honored in their station as the first parents of the earth. Significant references are 2 Ne. 2:15–26; 9:6–21; Mosiah 3:11–16;Alma 22:12–14; 42:2–15; D&C 29:34–44; Moses 5:9–13.