And as for the dead being raised, have you not read in the book of Moses, in the passage about the bush, how God spoke to him, saying, ‘I am the God of Abraham, and the God of Isaac, and the God of Jacob’? He is not God of the dead, but of the living. You are quite wrong.”
You don’t get into a debate with Jesus. He used their own book against them. The Sadducees didn’t believe in the spiritual, heaven and hell, angels and demons, they didn’t believe, nor did they believe in the resurrection. Jesus gave them the proof. God is the God of Moses… presently. How is that possible unless there’s a resurrection? The only hope of life after death is the resurrection. That’s why Paul says without the resurrection we may as well go have fun. That’s the hope of believers. Not reaching some higher enlightenment, not simply a better life now, not some floating non-existence playing a harp on a cloud… the resurrection of the dead. That’s the Blessed Hope we await! The Lord will return because he’s our God.