Proxy–representative, substitute, stand-in, go-between.
Propitiation–our substitute who appeases the wrath of the offended person (God) and enables reconciliation (go-between)
whom God set forthasapropitiationby His blood, through faith, to demonstrate His righteousness, because in His forbearance God had passed over the sins that were previously committed,
Therefore, in all things He had to be made likeHis brethren, that He might be a merciful and faithful High Priest in thingspertainingto God, to makepropitiation for the sins of the people.
And He Himself is thepropitiationfor our sins, and not for ours only but also for the whole world.
In this is love, not that we loved God, but that He loved us and sent His Sonto bethepropitiationfor our sins.