Jesus’ mission is clearly spelled out in Mark 8:31. His work as the Anointed One was to suffer, die, and rise from the dead. His suffering and death was necessary to pay the penalty for sin. He had had to suffer and die so that those who believe in him can be forgiven by God. His resurrection was also necessary, as proof that death has been defeated, and that God has the power to raise our mortal bodies from the grave.
31 Alors il commença à leur apprendre qu'il fallait que le Fils de l'homme souffre beaucoup, qu'il soit rejeté par les anciens, par les principaux sacrificateurs et par les scribes, qu'il soit mis à mort, et qu'il ressuscite trois jours après.