by jimwalton » Tue Apr 29, 2014 9:42 pm
Jesus' death was both physical and spiritual. He bled physical blood, ceased breathing (Mk. 15.37), and was physically dead. His executioners (professionals at this sort of thing, y'know) confirmed that he was physically dead (Jn. 19.31-34).
But his death was also a spiritual death. His agonizing cry from the cross, "My God, my God, why have you forsaken me?" illustrates that his death involved a separation from God, which shows us it was a spiritual death as well as a physical one. 2 Cor. 5.21 tells us that God made him to be sin for us (also Isa. 53.6). He wasn't a sinner, but the representative of sin. On Jesus fell the collective consequence of sin, which is spiritual death. He bore the guilt of sin, and so his death had to have been a spiritual death. Hebrews 9 and 10 speaks of the theological import of his physical and spiritual death.
By the way, spiritual death is not where your soul dies (which would be impossible), but where his soul was separated from God the Father. On the cross God made him the object of his wrath and judgment.