1 Thessalonians 3:10 Meaning: What Is Lacking in Your Faith?

The Greek behind this verse carries a weight that English struggles to hold. Paul prays exceedingly, the word is huperekperissou, a compound Paul himself may have invented. It means something like “more than more than abundantly.” He is not just saying a quick prayer before bed. He is begging (deomenoi), the same word a beggar uses for bread. This is not casual devotion; it is desperate love.

And what does he beg for? To perfect what is lacking, the Greek verb katartisai means to mend a torn net, to set a broken bone, to bring something back to full working order. It is the same word used when fishermen repair their nets. Paul does not think their faith is broken, but he knows it can be made more complete. The noun for “lacking” (husterēmata) means a deficit, something still missing. Paul sees their faith like a nearly finished mosaic: beautiful, already a picture of God’s work, but with a few tiles still to be set in place. He wants to be the one to hand them those tiles.

Christians across traditions have read this verse with the same pastoral warmth. Calvin, reflecting the Reformed emphasis on growth in grace, noted that even those who “far surpass others are still far distant from the goal.” He saw the gap not as failure but as the natural space for continued teaching. Matthew Henry, in the Puritan tradition, agreed: “No faith is made perfect at first; yea, the best faith may have something lacking.” Catholic interpreters have often highlighted Paul’s desire to “supply what is lacking” as a model for ongoing catechesis and the sacramental life that nourishes faith over time. The Wesleyan tradition, with its emphasis on Christian perfection, has seen this verse as pointing toward the possibility of being made whole in love. All these readings converge on one shared conviction: a genuine faith is always a growing faith.

Some readers hear “that which is lacking in your faith” and think Paul is scolding the Thessalonians for weak or defective faith. They imagine a letter full of criticism. In fact, Paul has just called their faith and love “good news” (v. 6). The lacking is not a lack of genuine trust in Christ; it is the natural gaps that remain after a short visit from an apostle. Paul wants to give them fuller instruction, deeper understanding, and greater maturity. Growth is not correction, it is completion.

Think of someone whose faith you admire. Maybe they have been steady through hardship. Maybe they serve others faithfully. Now ask: is there something you could help them grow in? A truth they have not yet grasped? An encouragement they need to hear? Paul’s example suggests that loving someone means praying for their growth, even when they are already doing well.

This week, pick one person. Pray for them with Paul’s intensity, using his words. And if you can, reach out. Your presence might be the very thing God uses to supply what is still missing in their faith.