joy in forgiveness

In small group, we discussed how we should be the happiest or most joyful people in the world. God has forgiven our sins. How blessed are we?
If You, LORD, should mark iniquities,O Lord, who could stand?But there is forgiveness with You,That You may be feared.O Israel, hope in the LORD;For with the LORD there is lovingkindness,And with Him is abundant redemption.Psalm 130:3-4, 7

Because we’re born wanting to prove ourselves worthy of God’s love, one of Satan’s favorite weapons is the irrational shame of canceled sin.
Repentance does require remorse, but not despair and depression. If our sin has been canceled (Colossians 2:14) and our condemnation called off (Romans 8:1), we shouldn't live and act and feel like the unforgiven. But we do.
Your words can be the God-given reminder that Jesus paid it all, and hell has no claim on those who are his. http://www.desiringgod.org/blog/posts/meet-the-miracle-next-to-you-this-morning 

How blessed is he whose transgression is forgiven,

Whose sin is covered!How blessed is the man to whom the LORD does not impute iniquity,

And in whose spirit there is no deceit!When I kept silent about my sin, my body wasted away

Through my groaning all day long.

For day and night Your hand was heavy upon me;

My vitality was drained away as with the fever heat of summer. Selah.I acknowledged my sin to You,

And my iniquity I did not hide;

I said, “I will confess my transgressions to the LORD”;

And You forgave the guilt of my sin. Selah.
Be glad in the LORD and rejoice, you righteous ones;

And shout for joy, all you who are upright in heart.Psalm 32:1-5, 11