Why is the concept of being righteous in Christ important for Christians?

Our righteousness is not based on our own works but solely on Christ's perfect obedience and sacrifice. 2 Corinthians 5:21 states 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 underscores the importance of being found in Christ, as we lack inherent righteousness. Understanding our identity in Christ helps us grasp the depth of God's grace and assures us of our eternal standing with Him, being embraced as His children.