Psalm 51:1-12 (ESV)
Create in Me a Clean Heart, O God
To the choirmaster. A Psalm of David, when Nathan the prophet went to him, after he had gone in to Bathsheba.
51 Have mercy on me, O God, according to your steadfast love; according to your abundant mercy blot out my transgressions. 2 Wash me thoroughly from my iniquity, and cleanse me from my sin! 3 For I know my transgressions, and my sin is ever before me. 4 Against you, you only, have I sinned and done what is evil in your sight, so that you may be justified in your words and blameless in your judgment. 5 Behold, I was brought forth in iniquity, and in sin did my mother conceive me. 6 Behold, you delight in truth in the inward being, and you teach me wisdom in the secret heart. 7 Purge me with hyssop, and I shall be clean; wash me, and I shall be whiter than snow. 8 Let me hear joy and gladness; let the bones that you have broken rejoice. 9 Hide your face from my sins, and blot out all my iniquities. 10 Create in me a clean heart, O God, and renew a right spirit within me. 11 Cast me not away from your presence, and take not your Holy Spirit from me. 12 Restore to me the joy of your salvation, and uphold me with a willing spirit.
1 John 1:7 (ESV)
7 But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus his Son cleanses us from all sin.
Psalm 51 is the most important prayer of repentance in the Bible (which is why we use it on Ash Wednesday). Today, notice how the writer asks for God to wash him. This is actually accomplished by Jesus on the cross. As John explains in his first letter, the blood of Jesus literally washes us. Now that you know that your salvation cost Jesus his blood, not yours, how will you respond when he calls for you to follow him?