2 Nephi 9 (part II)

2 Nephi 9:6 For as death hath passed upon all men...there must needs be a power of resurrection, and the resurrection must needs come unto man by reason of the fall. It seems that this is saying that the resurrection needs to be performed/brought about by a man, i.e. someone who was subject to the fall. Which coincides with all the terrible things that Christ had to suffer because of the fact that he was God operating within the limitations of humanity, but why? Is this an eternal principle that you have to dig yourself out of your own holes? Except it seems so broad--since a human ate the fruit and brought the fall, a human has to perform the atonement for all humans. Jacob speaks about that as though it's a given. He focuses on the mercy of the plan, and our eventual rise from death, but to me, the part that is fascinating is that we (humanity) are responsible for our own redemption from physical and spiritual death. Paul said, For since by man came death, by man came also the resurrection of the dead. For as in Adam all die, even so in Christ shall all be made alive. (1 Cor 15:21-22) In reading that, I've always focused on Adam causing death and God causing the resurrection (v. 22), but it's clear that Christ in this context is considered a man, not God, focusing on his mortal mother, not his celestial father.