If one does away with the fact of the Resurrection, one also does away with the Cross, for both stand and fall together, and one would then have to find a new center for the whole message of the gospel.
It is to the Cross that the Christian is challenged to follow his Master: no path of redemption can make a detour around it.
Without Easter, Good Friday would have no meaning. Without Easter, there would be no hope that suffering and abandonment might be tolerable. But with Easter, a way out becomes visible for human sorrows, an absolute future: more than a hope, a divine expectation.