13 But we do not want you to be uninformed, brothers, about those who are asleep, that you may not grieve as others do who have no hope. 14 For since we believe that Jesus died and rose again, even so, through Jesus, God will bring with him those who have fallen asleep. 15 For this we declare to you by a word from the Lord, that we who are alive, who are left until the coming of the Lord, will not precede those who have fallen asleep. 16 For the Lord himself will descend from heaven with a cry of command, with the voice of an archangel, and with the sound of the trumpet of God. And the dead in Christ will rise first. 17 Then we who are alive, who are left, will be caught up together with them in the clouds to meet the Lord in the air, and so we will always be with the Lord. 18 Therefore encourage one another with these words. 1 Thess 4:13–18
The reality of this physical life in the temporal is that the death of our bodies is inevitable. This is the result of the fall of Man that we find in Genesis 3. This fall changed our race so that we are mortal instead of immortal. We age and eventually die. We can become ill and die. We can be killed in many different ways. We do not live in these bodies forever. Along with that part of the fall, Man also became spiritually dead. All are born as children of wrath because we have within us a Sin Nature. The presence of sin within us separates us from God who is Holy. Prior to the fall, Man was fulfilled in God because His presence with Man. Man was vertically or God oriented. After the fall that part of Man died. Now Man is horizontally or temporally oriented. Man seeks fulfillment in desperation through the flesh, but it is futile. Only God’s presence fulfills, but Man has no ability or desire to seek God and His presence. Tragically, all who are separate from God in this life will also be separate from Him when they die. They will die in their sins and be forever cutoff from Him, suffering His wrath for eternity.