Create in Me a Pure Heart

Create in me a pure heart, O God,
    and renew a steadfast spirit within me.
Do not cast me from your presence
    or take your Holy Spirit from me.

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

Then I will teach transgressors your ways,
    so that sinners will turn back to you.

(Psalm 51:10-13)