Don't minimize wrath, or think it to be a small sin. It deserves immediate and full attention, when committed. To not treat it that way, is to concede to Satan and award him an advantage. Jesus taught some of these same things. Later, I'll remind you of that before you come to communion.
Communion symbolizes of that.
When we think of wrath, we see that it does not go away by itself. Somehow, or other, it must be taken away. When there is genuine offense, that will not just disappear. That wrath needs to be appeased, pacified. In human relationships that calls for forgiveness, and normally for something to happen before we are reconciled.