“Christ” means more than Jesus. It also refers to the new skein of relationships that arose around him during and after his life. Several biblical references support this interpretation. Paul frequently speaks of the Christ who dwells within him and within the other followers.
When, for example, he writes that among those who share the Spirit of Christ, “There is neither Jew nor Greek, there is neither slave nor free, there is neither male or female, for you are all one in Christ Jesus” he means something more extensive than the historical Jesus (Gal. 3:28).
The Easter cycle, with all its harshness, joy, and impenetrability, tells of this enlargement of the historical Jesus story into the Christ story. It says that who Jesus was, as the embodiment of a “different possible world,” was not ultimately defeated by the crucifixion, but continues.
from The Future of Faith