Romans 4:4-5

Now to him that worketh is the reward not reckoned of grace but of debt. But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness.

We want our faith to be counted for righteousness. We started out as the ungodly lost in our sins and received salvation. Now, we are a new creation washed clean of the old. By faith, we were saved through Jesus, and when the devil tries to remind you of the old self, you remind the devil of your righteousness. Jesus justified the ungodly and removed our condemnation.