Sword of the Spirit!

Even as a child of God, Satan wants to fill your mind with
doubts and fears; he wants to influence you toward sin and
wickedness so that you WILL DOUBT your salvation! Satan wants
you to be discouraged and depressed, and to have no assurance of
your salvation!
The helmet of salvation keeps the wicked one out of your head
and protects your mind and your thoughts from taking hits from
Satan, and fiery darts into your mind! The helmet of salvation
strengthens your assurance and your hope of eternal life from
Satan's assaults!