Therefore he who rejects doesn't reject man, but God, who has also given his Holy Spirit to you.

 The idea of the Second Coming had brought another problem to the people of Thessalonica. They were expecting it very soon; they fully expected to be themselves alive when it came but they were worried about those Christians who had died. They could not be sure that those who had already died would share the glory of that day which was so soon to come. Paul's answer is that there will be one glory for those who have died and those who survive. 