I think these two passages illuminate each other remarkably well. In Matthew 21, Jesus asks which son did the father’s will. In 1 Samuel 15, Samuel asks why Saul did not obey the voice of the LORD.
Put them together, and Scripture gives us a very rich theology of obedience.
👣 1. God distinguishes profession from obedience
The second son says exactly the right thing:
“I go, sir,” but he did not go. (Matthew 21:30)
Saul does something surprisingly similar:
“I have performed the commandment of the LORD.” (1 Samuel 15:13)
Both make a profession that their conduct contradicts.
The second son’s words say yes, while his feet say no.
Saul’s mouth says I obeyed, while Samuel can literally hear evidence to the contrary:
“What then is this bleating of the sheep in my ears?” (1 Samuel 15:14)
Christian obedience therefore cannot be established merely by what I say about my relationship to God’s will.
Jesus asks:
“Which of the two did the will of his father?” (Matthew 21:31)
Ultimately, obedience must become actual.
❤️ 2. But obedience is more than mechanical compliance
Our discussion then forced us deeper.
The first son doesn’t merely perform the action while remaining internally defiant:
“Afterward he regretted it and went.” (Matthew 21:29)
Something happens within him.
Likewise, Samuel’s concern with Saul isn’t merely livestock management. Eventually Saul admits:
“I feared the people and obeyed their voice.” (1 Samuel 15:24)
The external act reveals an internal allegiance.
This means biblical obedience has both an outward and inward dimension:
the will submits, the heart turns, and the action follows.
God doesn’t merely want bodies located in vineyards.
He wants sons who respond to their Father.
😫 3. Unwillingness does not excuse disobedience
This was one of the most important discoveries from the two sons.
The first son initially doesn’t want to go.
Yet he goes.
Therefore:
“I don’t feel like obeying” is not the same thing as “I cannot genuinely obey.”
We don’t have to wait until every emotion agrees with God’s command.
There can be genuine obedience that says:
“Father, I don’t yet want what I ought to want, but because I trust You, I will do what You have said. And please change what I want.”
That isn’t hypocrisy.
Hypocrisy is much closer to the second son’s:
“Yes, sir!”
followed by refusal.
🌱 4. Yet God intends to transform our desires too
God doesn’t intend Christian maturity to remain permanently:
command → resentment → teeth-gritting compliance.
He works deeper:
“For it is God who works in you both to will and to do for His good pleasure.” (Philippians 2:13)
To will and to do.
That’s beautiful after everything we’ve discussed.
God wants obedience, but He also works upon the willing from which obedience proceeds.
The trajectory is toward:
“I delight to do Your will, O my God, and Your law is within my heart.” (Psalm 40:8)
So we obey even while our feelings lag behind, but we don’t become content with their disorder. We bring them to God for transformation.
👂 5. Obedience begins by letting God define obedience
And here Saul teaches us something the two sons don’t emphasize as strongly.
Saul didn’t simply replace obedience with some obviously evil activity.
He replaced God’s command with another religious activity.
Sacrifice!
That’s why Samuel’s words are so devastating:
“To obey is better than sacrifice, and to heed than the fat of rams.” (1 Samuel 15:22)
Sacrifice was commanded by God. But Saul could not choose one divine ordinance to substitute for what God had explicitly commanded in that situation.
This means:
I don’t get to decide what I will give God instead of what He has asked from me.
That is enormously important.
🐑 6. Good things cannot sanctify disobedience
And this produced perhaps the sharpest sentence of our discussion:
You cannot offer God the product of your disobedience and call the offering obedience.
Saul cannot say:
“Yes, Lord, I obtained these sheep by disregarding Your command—but look what I’m going to do with them for You!”
The sacrifice doesn’t reach backward and sanctify the rebellion that preserved the animals.
This protects us from a dangerous religious instinct: compensation.
I cannot say:
“I refuse God here, but I’ll serve Him more over there.”
“I won’t forgive, but I’ll give generously.”
“I know what He commanded, but I’ll compensate with prayer, ministry, fasting, sacrifice…”
God doesn’t barter with us for sovereignty over particular rooms of our lives.
🌊 7. The greatest danger may be another voice becoming louder than God’s
Saul eventually gives us his own diagnosis:
“I feared the people and obeyed their voice.” (1 Samuel 15:24)
And this takes us straight into our discussion about currents.
Sometimes God’s command isn’t unclear.
It simply becomes less psychologically immediate than everything surrounding us.
The crowd is loud.
The opportunity is attractive.
Our emotions are intense.
The reasoning sounds plausible.
The consequences of obedience feel immediate.
And God’s word, spoken clearly, can suddenly seem strangely distant.
This is why Scripture repeatedly tells God’s people to remember (Deuteronomy 8:11–18; Psalm 103:2).
Sometimes our problem isn’t:
“God, tell me what You want.”
Sometimes He already has.
Our prayer needs to become:
“Lord, don’t let anything become more authoritative to me than what You have already said.”
🧭 8. Spiritual discernment means interpreting circumstances through God’s Word
Samuel and Saul looked at exactly the same sheep.
Saul saw:
valuable animals → sacrifice → worship.
Samuel saw:
God commanded their destruction → they remain alive → disobedience.
Same circumstances.
Different governing framework.
Samuel’s lifelong posture had been:
“Speak, for Your servant hears.” (1 Samuel 3:10)
That is profound spiritual discernment.
Not necessarily possessing mysterious insight into everything, but being so formed by God’s revelation that when a persuasive alternative appears, we can still ask:
“But what did the Lord actually say?”
🪞 9. We must be especially suspicious when our explanation conveniently preserves what we want
This one hurts. 😬
Saul’s reasoning didn’t sound ridiculous from inside Saul’s reasoning.
That’s the danger.
Sin frequently doesn’t present itself as:
“I know this is rebellion and I don’t care.”
It can present itself as:
“Actually, considering the circumstances…”
And then comes an elaborate explanation.
Jeremiah warns:
“The heart is deceitful above all things…” (Jeremiah 17:9)
So one mark of spiritual maturity is allowing Scripture to challenge not only what I do, but the story I tell myself about why what I’m doing is acceptable.
Samuel doesn’t merely challenge Saul’s action.
He destroys Saul’s interpretation of his action.
🙏 10. When exposed, the answer is repentance — not better explanations
The first son gives us the beautiful alternative:
“Afterward he regretted it and went.” (Matthew 21:29)
That’s hope.
The first son was wrong.
His first response was rebellion:
“I will not.”
But his first response didn’t have to become his final response.
He turned.
He went.
That means failure itself doesn’t have to become the defining issue.
The decisive question becomes:
What do I do when God’s Word exposes me?
Do I become Saul, defending the sheep?
Or do I become the first son:
“I was wrong. I’m going.”
That is repentance moving into obedience.
✝️ 11. And when we fail, Christ prevents obedience from becoming a system of compensation
This is where the gospel protects the whole discussion from becoming crushing.
When I discover that I have disobeyed, Christianity doesn’t tell me:
“Quick! Find enough sacrifices to compensate God.”
Christ Himself is the sufficient sacrifice:
“Christ also suffered once for sins, the just for the unjust, that He might bring us to God.” (1 Peter 3:18)
Therefore I can confess without constructing a defense:
“If we confess our sins, He is faithful and just to forgive us our sins…” (1 John 1:9)
Grace doesn’t make obedience unnecessary.
Grace makes honest repentance possible.
I no longer have to call my disobedience obedience in order to survive God’s judgment. In Christ, I can say:
“Father, I disobeyed.”
And then return.
❤️ Perhaps the whole discussion comes down to this
The second son teaches us:
Don’t say yes and live no.
The first son teaches us:
Even after saying no, repentance can turn around and obey.
Saul teaches us:
Don’t redefine your no as a yes merely because you’ve decorated it with religion.
Samuel teaches us:
Let God’s voice determine what obedience means.
And Christ takes us deeper still:
“If you love Me, keep My commandments.” (John 14:15)
So obedience is neither mechanical compliance, nor emotional spontaneity, nor religious performance, nor self-selected service.
It is the creature, and even more beautifully the redeemed child, increasingly saying:
“Father, because You are who You are, Your voice has the right to govern me. When my feelings disagree, transform them. When the current carries me, anchor me. When I rationalize, expose me. When I disobey, bring me to repentance. And increasingly make what You will become what I also delight to will.”
Perhaps that is the movement from “I will not” (Matthew 21:29), through “Speak, for Your servant hears” (1 Samuel 3:10), toward:
“I delight to do Your will, O my God.” (Psalm 40:8)
Not merely obedient hands.
A heart being taught to agree with its Father. ❤️