Introduction

Most people believe sin is something we do — a mistake, a bad habit, a wrong choice. We think, “If I just try harder, I can fix myself.”

But David teaches us something deeper. After his terrible sins with Bathsheba and Uriah, David doesn’t blame circumstances, people, or temptation. Instead, he looks inward and says:
“I was sinful at birth.”

David shows us that sin is not just an action — it is a condition.

1. Sin is not only behavior — it is nature

David does not say, “I became sinful.”
He says, “I was sinful at birth.”

This means:

• We are not sinners because we sin.
• We sin because we are sinners.

Sin is not just on the hands — it is in the heart.

You don’t have to teach a child to lie or be selfish. It comes naturally. Why? Because the problem is internal.

Outward religion cannot fix an inward disease.

2. Honest confession is the beginning of restoration

Notice David’s honesty.
He doesn’t:

• blame Bathsheba
• blame pressure
• blame the devil

He takes full responsibility.

True repentance begins when we stop making excuses.

Many say:

• “I made a mistake.”
• “I slipped.”

David says:

• “This is who I am without God.”

God heals the heart that admits its sickness.

If we minimize sin, we block mercy.
If we confess sin, we open the door to grace.

3. If sin is deep, grace must be deeper

This verse sounds heavy — almost hopeless.

If we are sinful from birth, what hope do we have?

The answer is: God must do what we cannot.

Later in this psalm David prays:

• “Create in me a clean heart”
• “Wash me”
• “Purge me”

He doesn’t say “I’ll fix myself.”
He says, “God, You must recreate me.”

We don’t need:

• education
• improvement
• self-help

We need transformation.

And only God can create a new heart.

4. The Gospel answer

David saw the problem clearly.
The solution is found fully in Jesus Christ.

Because of Christ:

• guilty hearts can be forgiven
• sinful natures can be renewed
• broken people can be restored

God doesn’t just clean us — He changes us from within.

Conclusion

Psalm 51:5 teaches us:

We are not basically good people who sometimes fail.
We are broken people who desperately need God’s mercy.

But here is the good news:

The same God who exposes our sin also offers cleansing.

So today:

• Stop pretending
• Stop excusing
• Start confessing
• Run to God

Because where sin runs deep, grace runs deeper.

Maranatha! Come Lord Jesus!