How do we know Christ's righteousness is true for us?

The assurance that Christ's righteousness is true for believers is founded on Scripture that emphasizes our union with Him. In 1 Corinthians 1:30, it is declared that the righteousness of Christ is given to those who are in Him, emphasizing that this state is initiated by God. Furthermore, 2 Corinthians 5:21 clarifies that God made Christ, who knew no sin, to be sin for us so that we might become the righteousness of God in Him. This union confirms that believers are not merely given Christ’s righteousness, but they are made righteous in Him, establishing their standing before God based on Christ’s perfect obedience and not their own works.