We wrestle against principalities and powers. We must take down their foundational strongholds, arguments, and pretensions. Stronghold (ochuromaton) is a military term referring to a fortress or fortified place. The word came to be used metaphorically for anything on which someone relies (Ralph Earle, Word Meanings’ in the New Testament, p. 260). In 2 Samuel 22:3, God claims the title of our Stronghold. So what is Paul saying? We must rip the foundations out from under all bastions of human reasoning that say, “I don’t need God!” We must demolish every non-God story of life. Pulverize every God is-not-good life narrative.
(Robert Kelleman, Soul Physicians, p. 110).