The great exchange!
“For Christ also suffered once for sins, the righteous for the unrighteous, that he might bring us to God, being put to death in the flesh but made alive in the spirit,” (1 Peter 3:18 ESV)
The righteous for the unrighteous
What Christ did for us on the cross is referred to by many as “the great exchange,” because He exchanged His righteousness for our unrighteousness.
Therefore
“But now He has reconciled you by Christ's physical body through death to present you holy, unblemished, and blameless in His presence” (Col. 1:22)