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The resurrection of Jesus saves us; and indeed, should be thought of as the culmination of the salvation won for us through Christ. The resurrection does not cancel the cross; this would be to commit the opposite theological sin! We must see each of the cross and resurrection in the light of the other.
The key is the self-offering love of Jesus in the cross to the Father (and simultaneously for the world, but that is another thread to follow) as the culmination of his whole life and identity as Son. (This is the point that John hammers time and again explicitly in his Gospel, but is clearly visible and apparent in the narrative of the Synoptics.) The same self-giving love of the Son in eternity is lived by the Son as Jesus of Nazareth. In the resurrection Jesus as Son is taken into the eternity of the Father; raised by the Spirit he receives the Father's love transforming his humanity. And this is nothing less than the eternal action of the Father in generating the Son in eternity; history, through the resurrection, is finally included, through the Son, in the eternal life of God.