It took the sacrificial death of Jesus Christ. The LAMB OF GOD one sacrifice for all of humanity (replacing all the 'temporary' blood atonements.
Now one SACRIFICE for ALL PEOPLE.
But so much more........
Because of His Resurrection , then, God the Holy Spirit....(who is God) comes to live IN.....'born-again' and judged on the Cross as 'sin-free' humanity as Christ in us. (only a spirit could actually LIVE IN US). Praise God for the TRINITARIAN DIMENSIONS OF OUR HOLY AND ALMIGHTY SAVIOUR GOD.