The word devil means backbitter. It can refer to someone who falsely accuses others. Why would the devil need to falsely accuse us when we are sinful?
First, I think he spends most of his time falsely accusing God. He wants us to believe that God is evil, unjust, or unloving. He wants us to think that we’re too far gone to find God’s love.
Second, he falsely accuses us because he can’t judge us by our hearts. Thankfully God sees all of us. He knows our intentions; the reasons behind our actions. He knows our every flaw, sickness, and weakness.
Finally, God knows the perfection of the one who was truly, falsely accused. The devil can’t accept that we’ve been made righteous through the resurrection of Jesus Christ. Don’t live under the burden of the devil’s accusations. Live in the freedom that Jesus has purchased. The devil says you’re guilty and condemned and Jesus says you’re pardoned and set free.
For the word of God is quick, and powerful, and sharper than any twoedged sword, piercing even to the dividing asunder of soul and spirit, and of the joints and marrow, and is a discerner of the thoughts and intents of the heart.(Hebrews 4:12)