This portion of our armor is our attack weapon in our spiritual warfare! It is God's revelation of His Truth to us through The Holy Spirit!
"Take the helmet of salvation and the sword of the Spirit, which is the word of God." (Ephesians 6:17)
"For the word of God is living and active. Sharper than any double-edged sword, it penetrates even to dividing soul and spirit, joints and marrow; it judges the thoughts and attitudes of the heart." (Hebrews 4:12)