Note 7 at 2 Cor. 10:4: One of the main weapons that Paul is speaking of is the gospel, the sword of the Spirit, which is the Word of God. It's the Word backed by God's Spirit that can pull down and crush the strongholds of Satan. Notice that Paul uses the word "weapons" in the plural, referring to many spiritual weapons. The following is a partial list of scriptures that speak of some of the weapons of God: Genesis 3:24; Joshua 5:13; Numbers 22:23, 31; 1 Chronicles 21:16; Judges 7:20; Jeremiah 50:25; Romans 13:12; 2 Corinthians 6:7; Ephesians 6:10-18; 1 Thessalonians 5:8; Revelation 1:16; 2:12; 19:15.

Note 8 at 2 Cor. 10:4: Every Christian is at war. There is a perpetual struggle against Satan and his kingdom from which there are no "leaves" or "discharges." Our enemy goes about as a roaring lion, seeking whom he may devour (1 Pet. 5:8). Those who resist the devil will see him flee (Jas. 4:7). The only ones whom he devours are those who don't actively fight against him.

The kingdom of heaven is under attack (Mt. 11:12) and only those who become militant in their resolve will enjoy the spoils that are ours through Christ (see note 2 at Mt. 11:12, p. 177).