How do we know Jesus Christ took our place for sin?

The core of the Christian faith is the belief that Jesus Christ, being fully God and fully man, took upon Himself the sins of His people. As stated in 2 Corinthians 5:21, 'He made Him who knew no sin to be sin for us, that we might become the righteousness of God in Him.' His death on the cross fulfilled the righteous requirements of the law, and He was made a curse for our transgressions. This substitutionary atonement is crucial, as it reveals God's love and justice, showing that Christ bore the penalty that we deserved.