The document discusses the "sword of the Spirit" mentioned in Ephesians 6:17. It explains that this sword is the word of God, or the Bible. Just as a Roman soldier's sword was both an offensive and defensive weapon, the Bible can be used both to defend against spiritual attacks from Satan and to launch offensive attacks by discerning and correcting wrong thoughts and attitudes. Effective use of the sword requires training in the scriptures, just as soldiers trained extensively with swords.