Why is Christ's righteousness essential for believers?

The righteousness of Christ is fundamental to our faith because it is through His perfect obedience that we are justified before God. Paul articulates this in Romans, explaining that just as sin entered the world through one man, Adam, righteousness is bestowed through one man, Jesus Christ. Those in Christ are counted as righteous not because of their works but through His righteousness that is imputed to them (Romans 5:19). This legal standing before God ensures our acceptance and justification; without Christ's righteousness, we would stand condemned due to our sinfulness. Hence, believers rejoice in the assurance that they are clothed in Christ's perfect righteousness, enabling access to God and eternal life.