Propitiation

Propitiation: Hebrews 3:25 ...whom God displayed publicly as a propitiation in His blood through faith. This was to demonstrate His righteousness, because  in the forbearance of God He passed over the sins previously committed;... 

Propitiation is the work of the Lord Jesus Christ by which He appeases the wrath of God and conciliates Him who would otherwise be offended by our sin and would demand that we pay the penalty for it.

Because of Propitiation, God is free to love the believer without compromising either His Righteousness or Justice. The thought in the Old Testament sacrifices and in the New Testament fulfillment is that Christ completely satisfied the just demands of a holy God for judgment of sin.

Propitiation is not the placating of a vengeful God; but it is, rather, the satisfying of the righteousness of a Holy God making it possible for Him to show mercy without compromise. Propitiation demonstrates the consistency of God's character in saving the worst sinners. Propitiation reconciles man to God. This means that sin is no longer the issued between man and God. The only issue, both for the Old Testament and New Testament believers, is "believe on the Lord Jesus Christ, and thou shalt be saved."