Ephesians 6:17 (KJV) And take the helmet of salvation, and the sword of the Spirit, which is the word of God:
The word of God is our sword. If you don’t learn to use your sword properly, the devil will use it against you. He used it against Eve (Yea, hath God said) and he tried to use it against the Lord Jesus Christ (Matthew 4:6). Are you skilled in the use of your sword or will Satan be able to use it on you?