Don't use big words you don't understand. You still aren't making the connection. If you're going to reduce the gospel to a sentence or two, make sure that you are telling all the important parts.
I take it you do not read your Bible for the word propitiation is found in it four times and means a sacrifice which satisfies and quenches wrath as a mercy seat.
Rom_3:25 whom God set forth as a propitiation by His blood, through faith, to demonstrate His righteousness, because in His forbearance God had passed over the sins that were previously committed,
Heb_2:17 Therefore, in all things He had to be made like His brethren, that He might be a merciful and faithful High Priest in things pertaining to God, to make propitiation for the sins of the people.
1Jn_2:2 And He Himself is the propitiation for our sins, and not for ours only but also for the whole world.
1Jn_4:10 In this is love, not that we loved God, but that He loved us and sent His Son to be the propitiation for our sins.