JMNT(i)
15 For this we are continuously saying to you in a word of the Lord (or: in the Lord's Word; in a message which is [the] Lord; or: in union with an idea from [our] Owner), that we, the presently living (or: the ones continuing to live) – the folks presently continuing to be left around unto the presence of the Lord (or: into the midst of the Lord's [= Christ's or Yahweh's] presence) – can by no means advance before (precede; have advantage over; outstrip) the folks being made to sleep,
16 because the Lord [= Yahweh or Christ] Himself will continue habitually descending (or: repeatedly descend) from [the] atmosphere (or: heaven) within the midst of (or: in union with) a shout of command, within the midst of [the] Chief Agent's (or: in union with an original messenger's or a chief and ruling agent’s) voice, and within the midst of (or: in union with) God’s trumpet [note: figure of a message or a directive for action], and the dead people within Christ (or: in union with [the] Anointed One) will continue raising themselves up first (or: will one-after-another be standing up again in [the or their] first place).
17 Thereupon (or: After that; As a next step) we, the presently living folks, the ones presently continuing to be left around, will – at the same time, together with them – proceed being seized and snatched away within clouds (or: carried off by force, in union with clouds,) into the midst of [the] air (the air that we breathe in; the mist; the haze; the atmosphere around us; [note: this would be in the earth's lower atmosphere, the place where there is air]) – into the Lord's meeting ([Christ’s or Yahweh’s] encounter; an encountering which is the Lord). And thus (in this way and such a manner) shall we always continue being (or: continue existing at all times) together with [the] Lord [= Christ or Yahweh].
18 So that (or: Consequently) you must constantly call each other alongside to give relief, encouragement and comfort, as a paraclete, within these words (or: thoughts; reasons).