Because Christ has been raised from the dead we know there is a resurrection of the body. You cant say there is no resurrection of the body anymore because, on the evidence of Christ, its beyond the realm of philosophic speculation. Christ Jesus has already demonstrated the resurrection of the body, so the dead will be raised. So foundational is the reality of the resurrection that if you take it away we have no reason for hope because our whole faith lacks credibility. That is what the Apostle Paul was saying in today's text.