JMNT(i)
20 "Yet if I, Myself – in union with ‘God's finger’ [Ex. 31:18] – continue casting out the demons (Hellenistic concept and term: = animistic influences), consequently God's reign (sovereign influence and activity; imperial rule; government; kingdom) really makes progress and has advanced to be beforehand upon you folks (or: has really made its way to and has overtaken you, so as to have arrived; or: outstrips [to be now] upon you people).
21 "Whenever the strong person – being one that has fully armed and completely equipped himself – may habitually watch over, guard and protect his own courtyard, his possessions and the things that sustain him continue being in peace.
22 "Yet as soon as (or: if ever) a person stronger than him, after coming upon [him], can conquer (or: may overcome) him, he progressively lifts up and carries off his full armament (all the armor and weaponry) upon which he had trusted and placed his confidence – and now progressively distributes his spoils (booty).