How can we be sure of our righteousness in Christ?

Believers can be sure of their righteousness in Christ because it is not dependent on their works but on the finished work of Jesus. According to 2 Corinthians 5:21, Christ became sin for us so that we might become His righteousness. Therefore, when God looks at His chosen people, He sees them clothed in the righteousness of Christ rather than their sinful state. This imputed righteousness gives believers confidence that they are accepted by God, affirming that their worth is found in Christ alone.