“Have mercy on me, O God, according to your steadfast love; according to your abundant mercy blot out my transgressions. Wash me thoroughly from my iniquity, and cleanse me from my sin!” Psalms 51:1-2 ESV
I have written about how we can’t throw out the Old Testament and accept the New Testament in its place, as modern sensibilities might suggest. (See, for instance, Jesus and the “Old Testament God”) The Old Testament is the seed for the New Testament. Everything revealed in the New Testament was first revealed in the Old Testament. The Old Testament finds its fulfillment in the New Testament.
Moderns tend to want to view “the Old Testament God” as something different from the God revealed in the New Testament by Jesus, but Jesus affirmed the Old Testament. Jesus says that the Old Testament anticipated and pointed toward him. (“And beginning with Moses and all the Prophets, he explained to them what was said in all the Scriptures concerning himself.” Luke 24:27)
The Bible verse of the day quoted above was prayed by David in Psalm 51. David expressed the desire of all of us when he asked God to have mercy on him, to “blot out” his transgressions, to wash away his iniquity and to cleanse him from his sins. We all have a conscience and a desire and need for the cleansing of our consciences.
We do have the capacity to ignore our consciences and to deny that desire for forgiveness. If we do that too often and too long, our consciences become callous and dull; the desire for forgiveness diminishes; and we no longer have the sensitivity God built into us that drive us toward Him. Psychology tells us that we all have that conscience, but we do have choice in how we respond to it.
C S Lewis talks about how our desires and our needs have a correlative reality in something that fulfills those desires and needs. He observes that we hunger, and there is food to meet that hunger; we thirst, and there is water to quench that thirst; we have sexual desires, and there is conjugal love we have with another person that fulfills that desire… at least temporarily.
That those desires are only temporally met and satisfied, says Lewis, suggests that there is something else, something more. We also have a deeper and more fundamental longing within us to know God and to be known by God, to be forgiven by God and for eternal life and relationship. CS Lewis says that the reality we know, the satisfaction of temporary longings and desires, is some evidence of a more fundamental and satisfying reality that will fulfill our enduring and deepest longings.