(1 Thess 4:16) For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first:
God in person will come down from Heaven. It will not be a substitute or an assistant but THE LORD HIMSELF! Rev 1:7 - “Behold, he cometh with clouds; and every eye shall see him, and they [also] which pierced him: and all kindreds of the earth shall wail because of him. Even so, Amen.” He will display that glorious body that we long for (Phil 3:21). Remember v. 15 - those that remain “shall not precede them which sleep.” Take a moment to notice Jn 5:28,29. All of the dead shall be raised here. It is only the ones that are in Christ that will stand with Christ. There are those who would link 1 Thess 4:16 with Rev 20:5. Their point is “The dead in Christ shall rise first (1 Thess 4:16), but the rest of the dead lived not again until the 1,000 years were finished” (Rev 20:5). We must note however that the first is contrasted with the “we which are alive and remain.” It is not the “in Christ” and “out of Christ” that are first and second. It is the dead in Christ and those who have not physically died when Christ returns that are first and second. There will be only one resurrection. Also note Acts 24:15: “And have hope toward God, which they themselves also allow, that there shall be a resurrection of the dead, both of the just and unjust.”
(1 Thess 4:17) Then we which are alive [and] remain shall be caught up together with them in the clouds, to meet the Lord in the air: and so shall we ever be with the Lord. .
“Then we which are alive and remain”
There will be men and women alive when Christ returns. Mankind will not literally annihilate itself. After the dead are raised, then those who are alive and remain shall be changed (Phil 3:20; 1 Cor 15:51-58). “shall be caught up together with them in the clouds” “Them” are the dead in Christ which have been raised. All the faithful will be caught up together in the clouds. “clouds” - Scripture ties Christ’s coming and clouds (Rev 1:7; Mt 24:30). The Lord’s presence is often associated with clouds and smoke (Ex 19:18; Isa 6:4; Psa 18:11,12; Mt 17:5). “to meet the Lord in the air” The literal reading is “to a meeting of the Lord in air.” The word “meet” – (GK - APANTESIS) is a noun. It is a meeting in the air. Christ will not set foot on the earth (2 Pet 3:7-11). “and so shall we ever be with the Lord” (Jn 14:1-3; 17:24).