I Thes. 4:13-5:11
One of the concerns of the Thessalonians that Paul addressed in his letter was the eternal destiny of those who had died before the return of Christ. Some thought that only those living at His return would go with Him into heaven and those already dead would be left behind.
Paul reminded them that Jesus died and rose again. Jesus also said, “All who are in the graves will hear His voice and come forth—those who have done good, to the resurrection of life, and those who have done evil, to the resurrection of condemnation.” Both the good and evil will be raised to face the judgment on that last day at the end of time.
The dead in Christ (Those who had died in a right relationship with Christ) will rise first. Paul further explained that those who are living will then be caught up together with them in the clouds to meet Christ in the air.
There will be no announcements or warnings just before the Lord returns. He will descend from heaven with a shout; a shout from an archangel; and the trumpet of God. This will be an awesome moment. There will be no further time for preparation. Judgment Day will have arrived! If we die before Christ returns, our death will be the end of preparation time for us. We should live each moment as if it were our last. Someday, it WILL be our last!