Thus, when the Lord describes the Creation by saying that it was “spiritual in the day that I created it; for it remaineth in the sphere in which I, God, created it, yea, even all things which I prepared for the use of man” (Moses 3:9), we understand the Lord to be saying that there was no death or corruption among God's creations. We would hardly expect God to create things in a state in which they are to die, decay, and dissolve. It was from this state- in which none of God's creations were subject to death, corruption, or change- that Adam fell.
Further, Lehi told us that in this state no living thing could enjoy the privilege of procreation. Thus Lehi brought us to the understanding that Adam fell to keep the great commandment of God that he and Eve have posterity. In so doing they introduced death to all things- temporal death or the separation of body and spirit, and a spiritual death in that they no longer lived in the divine presence. The Fall thus created the need for a redemption from death and from the separation of man from God. Lehi testified that such a Redeemer would come in the fulness of time.