Propitiation

Related - The Wrath of God - Atonement - Christ our High Priest - Penal Substitution

^"... for all have sinned and fall short of the glory of God,  and are justified by his grace as a gift, through the redemption that is in Christ Jesus,  whom God put forward as a propitiation by his blood, to be received by faith. This was to show God's righteousness, because in his divine forbearance he had passed over former sins." Romans 3:23-25

Since man is totally incapable of satisfying God’s justice except by spending eternity in hell, there is no service, sacrifice, or gift that man can offer that will appease the holy wrath of God or satisfy His perfect justice. The only satisfaction, or propitiation, that could be acceptable to God and that could reconcile man to Him had to be made by God. For this reason God the Son, Jesus Christ, came into the world in human flesh to be the perfect sacrifice for sin and make atonement or “propitiation for the sins of the people” (Hebrews 2:17). (Got Questions)