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Date Written: 5/1/26 Last Updated: 5/1/26


John Piper would speak with pastoral compassion, biblical precision, and gospel hope to someone in this exact situation. He has addressed this repeatedly in sermons, articles, Ask Pastor John episodes, and books like Future Grace and resources drawing from John Owen. His core message: Your earnest desire for saving faith is already a strong indicator of the Holy Spirit’s work (unbelievers do not long for this). Persistent indwelling sin is real and painful for every Christian this side of glory—but it does not disqualify you. What matters most for assurance is not sin’s persistence, but your resistance to it.

Here is what Piper would likely say, drawn directly from his teaching:

1. Rivet Your Eyes on Christ—Not Primarily on Your Sin or Feelings

Assurance is ultimately a gift of the Holy Spirit, not something you manufacture by perfect introspection.
“The assurance of salvation is a gift from the Holy Spirit. Romans 8:15–16 says, ‘You have received the Spirit of adoption as sons, by whom you cry, “Abba! Father!”’ The Spirit himself bears witness with your spirit that you are a child of God. When you cry out ‘Abba! Father! Jesus! Lord!’ that is the Holy Spirit testifying with your spirit that you are a child of God. So ask him for that gift.”
Piper would urge: Stop staring mainly at your heart and its failures. Instead, rivet your attention on Christ in the Gospels. See His glory, receive Him as Lord and Treasure, and confess with your mouth, “Jesus is my Lord—I receive Him.” No one can truly say that except by the Holy Spirit (1 Corinthians 12:3; Romans 10:9). Faith is receiving Christ as the supreme satisfaction of your soul. Look to the cross: “Christ died for me.” This is where assurance is kindled and preserved.

2. Your Struggle with Indwelling Sin Does Not Mean You Are Unsaved—It Can Be Evidence You Are

Piper (echoing Owen) is crystal clear:

“When it comes to assurance, what matters most is not sin’s persistence, but our resistance.”
Sin will wage war against your soul until Jesus returns (1 Peter 2:11; Romans 7). But the new birth means you hate your sin and make war on it. The distinguishing mark of saving faith is not perfection—it is that you fight anything that threatens to replace Jesus as your supreme Treasure.
“The evidence that you are a child of God is not that you have no sinful tendencies, but that you hate them and make war on them. … The Spirit bears witness that we are the children of God by leading us into mortal combat with our sin.”
If you are grieved by your sin, confess it quickly (1 John 1:8–9), and keep fighting by faith in future grace, that grief and resistance are signs of life—not death. A settled, eager, deliberate practice of sin without repentance is what destroys assurance (1 John 3:9). But ongoing struggle + confession + hatred of sin + pursuit of holiness is the normal Christian life.

3. Eight Practical Ways Piper Would Tell You to Live Out Assurance (Especially in the Battle)
From his teaching on living out assurance:

1. Pursue it earnestly—fight for full assurance with patience and faith (Hebrews 6:11–12).
   
2. Believe God’s testimony—He has given you eternal life; you have passed from death to life (1 John 5:11).
   
3. Abide in Christ—stay close to Him daily; don’t drift.
   
4. Think and pray—immerse yourself in sound doctrine and cry out to God.
   
5. Serve faithfully—steadfast ministry deepens confidence.
   
6. Make war on your sin—hate it and kill it by the Spirit (Romans 8:13). This is one of the clearest evidences you belong to God.
   
7. Endure suffering—it produces proven character and hope.
   
8. Trust God’s keeping power—He will guard you and establish you (2 Thessalonians 3:3).

4. Walk in the Light and Rest in Your Advocate

Piper often points to 1 John 1:7–9: Walking in the light doesn’t mean sinless perfection. It means the light of the gospel is so bright in your heart that when you sin, you see it, hate it, confess it immediately, and receive cleansing by Jesus’ blood. You have an Advocate with the Father—Jesus Christ the righteous (1 John 2:1–2). Come to Him now, not after you “clean up” your act.
Final encouragement from Piper’s heart: Your desire for saving faith, your grief over sin, and your fight against it are not signs you are lost—they are the Holy Spirit at work drawing you to Christ. Keep looking to Jesus. Keep confessing. Keep fighting by faith in His promises. He who began this good work in you will complete it (Philippians 1:6). You can know you are saved—not because you are strong, but because Christ is, and He is for you.

For Piper’s own words, I recommend his article “Am I Really a Christian? Lessons from John Owen” and the Ask Pastor John episode “How Do I Know I’m Saved?” on DesiringGod.org. He would pray with you and point you back to the sufficiency of Christ every time. You are not alone in this battle.

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