Lord, Have Mercy
Scripture
“Have mercy on me, O God, according to your unfailing love; according to your great compassion blot out my transgressions.
Wash away all my iniquity and cleanse me from my sin.”
Psalm 51:1–2 (NIV)
These words were written after one of David’s darkest moments. He had committed adultery with Bathsheba and arranged for her husband’s death in battle to cover it up. When the prophet Nathan confronted him, David didn’t defend himself or shift the blame. Instead, he turned to God in complete honesty and brokenness. Psalm 51 is the cry of a heart that knows it has sinned deeply but also knows the character of the One it has sinned against.
David doesn’t ask, “What can I do to make this right?” He knows he cannot. Instead, he begins with mercy. “Have mercy on me, O God.” His appeal is not based on his past faithfulness or his position as king. It is grounded solely in God’s unfailing love and great compassion. Sin always leaves a stain that you cannot wash away yourself. But David believed God could.
Centuries later, a man named John Newton understood this same desperation firsthand. Newton spent years as a slave trader, a man he later called wretched, complicit in unspeakable cruelty. When God finally broke through to him, he never got over the weight of what he’d been forgiven for. Near the end of his life, with his memory failing, he told a visiting friend the only two things he still knew for certain.
“My memory is nearly gone; but I remember two things: that I am a great sinner, and that Christ is a great Saviour.”
— John Newton¹
Newton went on to write “Amazing Grace” with David’s story in Psalm 51 specifically in mind, a king who had betrayed and killed, forgiven by the same mercy that later reached a slave trader. That’s the gospel: God’s compassion runs deeper than your sin, no matter its shape or size. Like David, and like Newton, you can come to God each morning with this same prayer on your lips: “Have mercy on me, O God.” His mercy is new every morning, and His love never fails.
Reflection
- Why do you think David went straight to God for mercy instead of trying to fix things himself?
- What does John Newton’s story teach you about the reach of God’s mercy?
- How might beginning your day with a prayer like David’s shape your thoughts, actions, and attitude?
Prayer
Ask God to remind you of His unfailing love and great compassion today. Bring Him whatever guilt or shame you’ve been carrying and trust Him to cleanse and renew your heart. Thank Him for mercy that never runs out and love that never lets go.
Footnote
¹ John Newton, quoted in Wise Counsel: John Newton’s Letters to John Ryland Jr., ed. Grant Gordon (Carlisle, PA: Banner of Truth, 2009), p. 401.