The great sacrifice he made to pay for our sins and overcome death is called the Atonement.
Physical death is separation of the body and spirit.
Spiritual death is separation from God. But our wise Heavenly Father prepared a wonderful, merciful plan to save us from physical and spiritual death. The one who would be our Savior would need to be sinless and to have power over death. Discussion Compare our earthly bodies to a hand with a glove on it. Take off the glove.