JMNT(i)
15 Then He said to them, "As you are journeying on your way (or: As you are traveling) into all the ordered system (the world of religion, culture and government; secular society), you men make a public proclamation of the good news (or: herald the good message of ease and wellness) to the entire creation (or: in all the founded and civilized area that has been reclaimed from the wild).
16 "The trusting and believing one – as well as one being immersed (baptized) – will continue being restored to health and wholeness (be delivered, rescued, made safe, and returned to his original state and condition). Yet the distrusting person (the one being without faith; or: the faithless one) will proceed being commensurately evaluated and correspondingly decided about (or: beseparated down according to the pattern; have a decision rendered against him; be condemned).
17 "Now these signs will continue following along beside in (or: by; with; for) those trusting and believing: within and in union with My Name, they will be periodically casting out demons (Hellenistic concept and term: = animistic influencess). They will from time to time be speaking to new languages (or: with, in and by new tongues).
18 "Further, they will progressively carry away and remove (or: lift up) serpents [some MSS add: in or with {their} hands], and if they should ever drink anything deadly it can (or: may) under no circumstances harm (injure; hurt) them. They will continue placing hands upon folks being without strength (= sick people; disabled folks; infirm ones), and they will progressively have [it] ideally (or: will be possessing [themselves or situations] beautifully)."
19 So then, after [times of] speaking with them, the Lord Jesus is taken back up again (or: was received again) into the midst of the atmosphere (or: sky; heaven), and sits (or: sat down; = assumes the throne) at God's right [side, or, hand]. [Ps. 110:1]
20 Yet those men, in [their] going forth (or: upon exiting [the area]), made public proclamations of the Lord (or: from the Lord; pertaining to the Lord) everywhere – He continuously cooperating and working together, and repeatedly establishing (setting on good footing) the message (the Word; the thought; the idea) through the consistently accompanying signs (or: by means of the signs which continued attending as sequels). [written circa A.D. 45-60 – Based on the critical analysis of John A.T. Robinson]