What does the Bible say about the work of the believer?

According to Proverbs 21:8, the work of the pure is right because it is not based on their own merits but is rooted in the grace of God. This contrasts with the works of the wicked, which are rooted in self-deception and ultimately lead to destruction. The believer, who is washed in the blood of Christ and clothed in His righteousness, derives the ability to do good works from God Himself. This underscores the importance of dependence on God's grace rather than relying on personal effort or merit.