By His stripes we are healed

Surely He has borne our griefs and carried our sorrows; yet we esteemed Him stricken, smitten by God, and afflicted. But He was wounded for our transgressions, He was bruised for our iniquities; the chastisement for our peace was upon Him, and by His stripes we are healed. All we like sheep have gone astray; we have turned, every one, to his own way; and the LORD has laid on Him the iniquity of us all.—ISAIAH 53:4–6,

Isaiah speaks of God placing all our sins on His Son, the Lord Jesus Christ. He bore the grief for our sin, carried the sorrow for our lawlessness, was wounded for our transgressions and bruised for our iniquities. But by whom, and why? He was stricken, smitten, and afflicted by God, because God is the Judge. God alone can determine the appropriate punishment for sin; and God gave that punishment to His Son. He did that because there was no other one who could take our place, no other spotless Lamb, no other perfect sacrifice. So in order for us to have peace with God, Jesus paid the price for our sins. By His wounds we are healed spiritually. Every one of us has followed his own sinful path, and the Lord gathered all of our iniquity and laid it on Him. This is the amazing reality of Jesus Christ. He offered Himself, the sinless One, for the sinful ones. Every person has sinned, and for everyone who puts their trust in Jesus Christ that sin is paid for.