2 Corinthians 10
The powers of hell are still trying to destroy the work of God (Matt. 16:18), and it is important that we not yield any ground to the enemy, not even one church!
The military metaphor is evident here. The arguments Paul destroys are the ‘strongholds’ in which people fortify themselves against the invasion of the knowledge of God (the gospel). The expression every proud obstacle translates pan hypsōma epairomenon (lit. ‘every high thing lifted up’), which belongs to the world of ancient warfare and denotes a tower or raised rampart. Both the stronghold of v. 4 and the tower (proud obstacle) of this verse stand for the intellectual arguments, the reasonings erected by human beings against the gospel.
The imagery is of a stronghold breached and those sheltering behind its walls taken captive.