The resurrection is not an optional extra as a doctrine. It is vital to the entire Christian faith. To deny it is to become, in this day and age, a materialist. It is to deny that God supernaturally involves Himself in this world and comes closer to a view called deism which believes that God simply leaves the world to follow its natural laws and processes without His aid. We do not believe that. We believe that God very much involves Himself supernaturally in this world and that the resurrection is clear evidence of that fact. So we have good news to consider as Christians. But it is interesting to find that Paul concludes this teaching on the truth of the resurrection with an exhortation to carry on labouring in the Lord. Believing in the resurrection, in Paul's mind, links up with us serving Him joyfully and in a fulfilled way. The good news means that we have a work to do.
1: It can all seem in vain 2: The resurrection changes our perspective