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Finally, if salvation was only for the soul, what more would this be than what is already said by Pythagoras and Plato? The gospel is ‘a new a strange hope’, not a slight variation on one already well known. The fragmentary treatise concludes with a passage which belongs exactly with the overall argument of 1 Corinthians: because the flesh rises, its behavior in the present time matters enormously, whereas if it did not, one might as well indulge its various appetites. In fact (and here he quotes Justin Martyr) if Christ our physician(God having rescued us from our desires) regulates our flesh with his own wise and temperate rule, it is evident that he guards it from sins because it possesses a hope of salvation.
-N.T. Wright, The Resurrection of the Son of God, p.503
Think about that. What is so different about the resurrection described in the Bible? It’s NOT just a spiritual fly away to heaven thing. It involves your body – the one you have right now. That’s why it matters what you do with your body right now (even though it’s going to be redeemed).