JMNT(i)
19 These folks are those who are separating by setting boundaries, soulish ones (folks dominated by, or living focused on, those things which characterize the soul [= emotions; will; intellect; "feelings"] or this present, transient life) not having [the] Spirit (or: not habitually holding a [proper] attitude; or: not continually in possession of spirit or Breath-effect).
20 But you, dearly loved ones, while constantly and progressively building yourselves up by your most holy trust and with you people's most sacred, convinced loyalty (or: in y'alls' most set-apart faith), [and] continuously thinking, speaking and acting toward having well-being and things going well (or: praying) within the midst of a set-apart Breath-effect (or: in union with [the] Holy Spirit; centered in a separated and consecrated attitude and life-force),
21 maintain (guard; keep watch over; protect) yourselves in God's love (or: in union with [the] urge toward reunion and unambiguous acceptance, which is God), being folks in the habit of welcomingly receiving, embracing and entertaining the mercy of our Lord, Jesus Christ, on into a life having the qualities and characteristics of the Age (or: a life pertaining to the ages; eonian life; life for the ages; life whose source is the Age [of Messiah]).