Restore to me the joy of your salvation and grant me a willing spirit.

Psalm 51:11-19  
11 Do not cast me from your presence or take your Holy Spirit from me.  12 Restore to me the joy of your salvation and grant me a willing spirit, to sustain me.  13 Then I will teach transgressors your ways, so that sinners will turn back to you.  14 Deliver me from the guilt of bloodshed, O God, you who are God my Savior, and my tongue will sing of your righteousness.  15 Open my lips, Lord, and my mouth will declare your praise.  16 You do not delight in sacrifice, or I would bring it; you do not take pleasure in burnt offerings.  17 My sacrifice, O God, is a broken spirit; a broken and contrite heart you, God, will not despise.  18 May it please you to prosper Zion, to build up the walls of Jerusalem.  19 Then you will delight in the sacrifices of the righteous, in burnt offerings offered whole; then bulls will be offered on your altar.