the point of his resurrection was a major part of establishing the faith with vindication and a miracle.
also to the conquering and overcoming death and taking the curse of death upon himself for the salvation of all mankind.
Rom 6:8 Now if we be dead with Christ, we believe that we shall also live with him:
:9 Knowing that Christ being raised from the dead dieth no more; death hath no more dominion over him.
:10 For in that he died, he died unto sin once: but in that he liveth, he liveth unto God.
Php 3:10 That I may know him, and the power of his resurrection, and the fellowship of his sufferings, being made conformable unto his death;
Heb 9:16 For where a testament is, there must also of necessity be the death of the testator.
Heb 9:15 And for this cause he is the mediator of the new testament, that by means of death, for the redemption of the transgressions that were under the first testament, they which are called might receive the promise of eternal inheritance.
Heb 2:14 Forasmuch then as the children are partakers of flesh and blood, he also himself likewise took part of the same; that through death he might destroy him that had the power of death, that is, the devil;
Heb 2:9 But we see Jesus, who was made a little lower than the angels for the suffering of death, crowned with glory and honour; that he by the grace of God should taste death for every man.