Chapter 8: The Fall, E: In This Life We Are Subject to the Enticements of the Flesh and the Spirit

In this life we are placed in between two tempting forces that are pulling us in opposite directions. The spirit wants us to become better people. The physical wants us to gratify pleasures immediately without regard to consequences.

For the natural man is an enemy to God, and has been from the fall of Adam, and will be, forever and ever unless he yields to the enticing of the Holy Spirit, and putteth off the natural man and becometh a saint through the atonement of Christ the Lord, and becometh as a child, submissive, meek, humble, patient, full of love, willing to submit to all things which the Lord seeth fit to inflict upon him, even as a child doth submit to his father.
Mosiah 3:19

For they that are after the flesh do mind the things of the flesh; but they that are after the Spirit the things of the Spirit. For to be arnally mined is death; but to be spiritually mindedis life and peace. Because the carnal mind is enmity against God; for it is not subject to the law of God, neither indeed can be. So the then they that are in the flesh cannot please God.
Romans 8:5-8

Man has a dual nature; one, related to the earthly or animal life; akin to the divine. Whether a man remains satisfied withint what we designate the animal world, satisfied with what the animal world will give him, yielding without effort to the whim of his appetities and passions and slipping father and farther into the realm of indulgence, or whether, through self-master, he rises toward intellectual, moral, and spiritual enjoyments depends on the kind of choice he makes every day, nay, every hour of his life.
David O. McKay, Gospel Ideals, 347-48