Romans 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;” (NASB)
The big word in this verse is propitiation; it is the act of getting rid of the sin that was between God and man. We need to go back to the Old Testament to really get its meaning. The Mercy Seat was the golden cover atop the Ark of the Covenant, Exodus 25: 17- 22. The Mercy Seat is where God (LORD God Jehovah) and sinful man (the Priest) met on the Day of Atonement. The priest would sprinkle the blood of the sin and burnt offering in front of the Mercy Seat seven times and on the Mercy Seat once to make atonement for Israel.
The Mercy Seat had two angels on either side of it facing each other but looking down. They were looking at the Testimony, The Law, which Israel and man broke. When the blood of sacrifice was applied the angels now would be looking at the blood. Now if we can gasp this, we will be able to bring this into what propitiation is.
The Lord Jesus is our propitiation, propitiatory sacrifice, our Mercy Seat under the Law. Christ Jesus is our priest, our sacrifice, our altar, our all in all. The demonstration of His Righteousness is the fact the we are the ones that need to atone but His gives us Himself as the Atonement and all we have to do is walk, in faith, in what He has provided.
God’s forbearance or tolerance speaks directly of His Divinity. With all the sinning we did before we confessed the name of Jesus, God had the right to take us in our sins. But thank you Jesus His didn’t, Ephesians 2: 1- 9.