Why is it important that Jesus took on our sins?

The importance of Jesus taking on our sins lies in the doctrine of substitutionary atonement. Through His vicarious suffering, Jesus not only bore our sins but also took upon Himself the curse that was due to us. This acts as the basis for our justification, whereby, through faith in Him, we are considered righteous in the sight of God. As articulated in 2 Corinthians 5:21, He who knew no sin became sin for us so that we might become the righteousness of God. This conveys the profound depth of grace and mercy inherent in Christ's character as our Savior.