What does the Bible say about Jesus as our substitute?

In Isaiah 53:5, we read that 'He was wounded for our transgressions, He was bruised for our iniquities; the chastisement of our peace was upon Him, and with His stripes we are healed.' This passage highlights the doctrine of substitutionary atonement, where Jesus takes upon Himself the sins of His people to bear the punishment they deserve. It underscores that He did not suffer for His own sins, for He was without sin, but rather bore the iniquities of many. This concept is central to understanding the fullness of the gospel, as it reveals God's mercy in justifying the ungodly while maintaining His righteousness.