Therefore, as Adam brought about mortality, Christ brought about immortality and for those who accept Him, eternal life. But, if Adam had not partaken of the fruit, there would be no need for Jesus Christ, and Lucifer would never have had to display his incredible temper and prideful, rebellious personality.
The fall is the child of the creation and the atonement is the child of the fall (McConkie, A New Witness for the Article of Faith, pg. 81). Salvation was made available in and through the creation, the fall, and the atonement. These three are each part of one divine plan.
They are not one and the same entity, but rather one in purpose and one in direction, which is …to bring to pass the immortality and eternal life of man (Moses 1:39).
It is not possible to believe in Christ and his atoning sacrifice, in the true and full sense required to gain salvation, without at the same time believing and accepting the true doctrine of the fall. If there had been no fall, there would have been no need for a Redeemer or Savior. And it is not possible to believe in the fall, out of which immortality and eternal life come, without at the same time believing and accepting the true doctrine of the creation. If there had been no creation of all things…there could have been no fall…The Father’s eternal plan called for the creation, for the fall, and for the atonement, all woven together into one united whole. (Bruce R. McConkie, A New Witness for the Articles of Faith, pg. 82)