JMNT(i)
12 even continuously giving evidence (witnessing; confirming by testimony) unto you folks to be continuously walking about worthily of the God (= living your lives in a manner equal in value with regard to the God) [Who is] continuously calling (or: repeatedly inviting) you people into His own kingdom (or: reign; sovereign influence and activity) and glory (or: a manifestation which calls forth praise; or: reputation; or: opinion and imagination; or: = manifest presence).
13 And so, on account of this, we ourselves also continuously give thanks to God (or: affirm the goodness of the grace and favor in God) by an unvarying practice (or: incessantly; unintermittingly), because in receiving (or: taking to [your] side; accepting) God's word and message, from a hearing from us at our side, you welcomingly accepted not a word of or from people (or: a human message), but rather, according as it really and truly is, a word of God (God's message; an idea from God; a thought which is God), Which (or: Who) also (or: even) is continuously in-working (being active; operating; energizing) within and among you folks – those continuously trusting and progressively believing with loyalty.