1John 2:2 He Himself is the propitiation for our sins, and not only for ours, but also for those of the whole world. (HCSB)

John uses a funny word here: propitiation is the English translation.  What does it mean?  Well, I could give you the theologians version which would put you to sleep faster than deciding to read through a cookbook. Instead, I will give you Keith Getty’s explanation which is succinct and to the point (even though a certain section of the Presbyterian church wishes he would expunge these lines from his famous hymn “In Christ Alone”).

In Christ alone, Who took on flesh,
Fullness of God in helpless babe!
This gift of love and righteousness,
Scorned by the ones He came to save.
Till on that cross as Jesus died,
The wrath of God was satisfied;
For ev’ry sin on Him was laid—
Here in the death of Christ I live.

What is propitation?  The wrath of God was satisfied.