Propitiation

Big word, I know. Maybe this video will help you with the Doctrine of Propitiation. The word propitiate simply means to make favorably inclined; to appease; to satisfy.

http://www.youtube.com/watch?feature=player_embedded&v=a0EKBf1FrGY#!

[2:1] My little children, I am writing these things to you so that you may not sin. But if anyone does sin, we have an advocate with the Father, Jesus Christ the righteous. [2] He is the propitiation for our sins, and not for ours only but also for the sins of the whole world.
-1 John 2:1-2

Jesus has made atonement (made us at-one with God) for us. He has satisfied the demands of the law, and since He’s paid the price for our sins, it would be unjust for God to ask for two payments. Do you see the freedom in that sacrificial love? He’s our advocate; Jesus Christ the righteous. All the righteousness that I need is in Him, and all the debt I owe has been paid by Him.