Jesus called satan the father of lies, that means every word he speaks is false. He uses his falsehoods to constantly slander God’s children, “For the accuser of our brothers and sisters has been thrown down to earth—the one who accuses them before our God day and night” (Revelation 12:10).
But we’re not helpless victims against the devil’s slander. The Holy Spirit reminds us of what the Word of God says, and what the God of the Word has done (John 14:26). That Word becomes our sword and shield against the slanderer, “They triumphed over him by the blood of the Lamb and by the word of their testimony” (Revelation 12:10-11).
This passage from Psalm 139 is a great weapon to use against the devil whenever he slanderously calls into question your worth in God’s sight. Silence his lies and strike him down with the Truth that your value to God is immeasurable!