The Big Guns: Righteousness Credited, Not Earned

A Summary of the Katy Bible Sermon “Breaking Out the Big Guns”, preached by Matt Mancini on March 1st, 2026. 

As we move through the week, it’s worth lingering over the ground we’ve covered. We’ve been leaning into the doctrine of justification—how a sinner can be made right with a holy God. For many of us - as was the case with the Jews of Paul’s day - the default setting of our hearts is to see the Law as a ladder we must climb to reach heaven. But as we saw, the Law isn't a ladder; it’s a mirror.

We instinctively prefer ladders. Ladders give us something to do. They let us measure progress. They give us a sense of control - of accomplishment. They fan the embers of our comfortable pride: “I’m not perfect, but I’m climbing.” The mirror, though, is brutally honest. It doesn’t grade on a curve. It doesn’t whisper sweet-sounding, relativist lies to us. It simply reflects reality. It doesn’t allow us to be comfortable with half-measures but reveals us for who we truly are - warts, blemishes and all.  And when the Law holds up the mirror, we don’t see minor imperfections—we see that even our best efforts are stained with mixed motives, pride, fear, and self-preservation. That even our best efforts are filthy rags. The mirror was never meant to save you. It was meant to send you looking for the Savior.

To prove that justification has always been by grace alone, through faith alone, in Christ alone, Paul "breaks out the big guns": Abraham and David—two of the most significant figures in Israel’s history.

1. The Credit: Abraham’s Highlight Reel vs. The Reality

If anyone had a resume worth boasting about, it was Abraham. He left his home in Ur to follow a God he’d never heard of, and he was even willing to offer up his son, Isaac, in obedience. Yet Paul is clear: Abraham had nothing to boast about before God.

When you look beyond Abraham's "highlight reel," you see a man who was often astonishingly sinful. He was "mostly" obedient, yet he wasted fifteen years in Haran. He was a coward in Egypt, risking his wife’s honor in service to his own cowardice. He even fathered a child through an adulterous marriage to Hagar, his wife’s maid, on that same wife’s catastrophically bad advice - a sin that brought a ripple of consequences that became a tsunami whose effects are still felt 4,000 years later.

So if not by his works, then how was Abraham justified? He believed God, and it was credited to him as righteousness. 

Notice what the text does not say. It does not say Abraham behaved his way into righteousness. It does not say he improved enough to qualify. It says he believed. Faith wasn’t a spiritual achievement; it was a transfer of trust. He stopped placing weight on his performance and placed it on God’s promise. And the moment he did, God counted him righteous—not partially, not provisionally, but fully.

Righteousness was reckoned to him. It became his as if he had earned it, even though he hadn’t. Faith is the hand that receives the gift; it isn't the work that earns it.

2. The Contrast: A Wage vs. A Gift

Paul doesn't leave room for "fence-sitting." He argues that grace and works cannot coexist as the basis of our justification. If even 0.0001% of our salvation depends on our good deeds, then grace is excluded. Works play a part. And when works play a part, then justification becomes a wage—something God owes us.

But God doesn't owe us. Scripture says He justifies the ungodly. This is the "melody to the sinner's heart": God doesn't wait for you to become godly before declaring you righteous. He declares you righteous in your ungodliness because you have rested your confidence on Him. Grace is not God rewarding your trajectory; it is God rescuing your inability. If that feels unsettling, it’s because grace leaves no room for boasting. It strips us of the illusion that we were almost there.

3. The Confirmation: David’s Song of Relief

Lest we think Abraham was an exception, Paul calls King David to the stand as a second witness. David—a man after God's own heart, yet also an adulterer and a murderer—knew the crushing weight of "lawless deeds".

In Psalm 32, David bursts with relief because God does not count his sin against him. Why? Because those sins were accounted to Jesus Christ at the cross. In this divine exchange, our sin is imputed to Christ’s account, and His perfect righteousness is imputed to ours.

What does this mean for Tuesday afternoon when you fail again? It means your standing with God does not wobble with your performance. What does it mean when shame whispers that you should hide? It means you can come boldly instead. You fight sin now not to earn acceptance but because you already have it - and because you are guaranteed ultimate victory! Obedience becomes gratitude, not negotiation.

As you go about your week, remember this: You are not justified by your faith, as if faith were a work. You are justified through faith in what Jesus has already accomplished. If you feel the weight of your own ungodliness today, take heart. The "big guns" of the faith—Abraham and David—stand as witnesses that God's grace is for the sick, not the healthy; for the sinner, not the self-righteous.

Rest in this: what needed doing has already been done.