Why is the concept of Christ as our righteousness important?

In Isaiah 59:16, we see that the Lord's arm brought salvation, and this is ultimately fulfilled in Christ. He embodies God's righteousness, as expressed in Isaiah 53, where He bore our griefs and was wounded for our transgressions. This highlights the substitutionary atonement where Christ takes our place, ensuring that we are made righteous through faith in Him. As believers, our acceptance before God is not based on our works, but solely on the righteousness of Christ, which is imputed to us, securing our standing with God permanently.