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, NIV84
The Bible is not just a book with words we should read--it's the inspired Word of God. Those words are alive and work in us through the power of the Holy Spirit as we read them, believe them, and receive them into our hearts and minds. Ephesians 6 tells us the Sword of the Spirit is the word of God. When my head is filled with lies, and I apply God's Word to those thoughts, it's as though the Holy Spirit takes a sword and slices right through them. The lies fall slain. God's Word stands tall.