Expositor's Bible Commentary Commentary 2 Corinthians 10:4

"(for the weapons of our warfare are not of the flesh, but mighty before God to the casting down of strongholds)," — 2 Corinthians 10:4 (ASV)

Paul draws a clear distinction between existence “in the world” and worldly conduct and techniques. He does not deny his human weakness, yet he affirms that spiritual warfare demands spiritual weapons (vv.3–4a; cf. Ephesians 6:11–17). A successful campaign can be waged in the spiritual realm only as worldly weapons are abandoned and total reliance is placed on spiritual weapons, which can demolish apparently impregnable fortresses where evil is entrenched (v.4b).