"And it came to pass that Adam, being tempted of the devil—for, behold, the devil was before Adam, for he rebelled against me, saying, Give me thine honor, which is my power; and also a third part of the hosts of heaven turned he away from me because of their agency; And they were thrust down, and thus came the devil and his angels; And, behold, there is a place prepared for them from the beginning, which place is hell.
"Wherefore, I, the Lord God, caused that he should be cast out from the Garden of Eden, from my presence, because of his transgression, wherein he became spiritually dead, which is the first death, even that same death which is the last death, which is spiritual, which shall be pronounced upon the wicked when I shall say: Depart, ye cursed." (D&C 29:36-38, 41)
"Then shall he say also unto them on the left hand, Depart from me, ye cursed, into everlasting fire, prepared for the devil and his angels." (Matthew 25:41)
Consider that when babies are born, they are Celestial, they are the hosts of heaven. If each of us should consider ourselves Adam and Eve, then who are "before" us which tempt us? And what are they tempting us to stop being like? When we fall, and are "cast out" (Depart, ye cursed), then this earth is a place prepared for the devil and his angels. The goal then, seems to escape from hell.
"O the greatness of the mercy of our God, the Holy One of Israel! For he delivereth his saints from that awful monster the devil, and death, and hell, and that lake of fire and brimstone, which is endless torment." (2 Nephi 9:19)