The power of the Word of God in a believer's life can help overcome the tactics of the devil.
Psalms 119:105-112 KJV Thy word is a lamp unto my feet, and a light unto my path.  I have sworn, and I will perform it, that I will keep thy righteous judgments.  I am afflicted very much: quicken me, O LORD, according unto thy word.  Accept, I beseech thee, the freewill