Luke 15:29: Serving God with sincerity?
What does Luke 15:29 teach about serving God with the right heart?

Setting the Scene

Luke 15 records Jesus’ parable of the two sons.

• The younger son squandered his inheritance and returned repentant; the father welcomed him with a feast.

• The spotlight then shifts to the older son, whose reaction exposes the inner attitude Jesus wants us to examine.


The Older Son’s Complaint

Luke 15:29: “But he answered, ‘Look, all these years I have served you and never disobeyed your commandment. Yet you never gave me a young goat, so I could celebrate with my friends.’”

Key observations:

• “All these years I have served” – a lifetime of outward faithfulness.

• “Never disobeyed” – scrupulous rule-keeping.

• “Yet you never gave me” – focus on perceived lack of reward.

• “So I could celebrate with my friends” – desire for self-centered pleasure rather than fellowship with the father.

The verse exposes not actions but attitudes—revealing how easy it is to serve correctly yet harbor a wrong heart.


Serving Out of Duty vs. Devotion

Duty-driven service (older son)

• Measures faithfulness by length of service and flawless performance.

• Keeps score of what God “owes” in return.

• Finds motivation in obligation, fear of missing out, or comparison with others.

Devotion-driven service (the father desires)

• Flows from intimacy and gratitude (Luke 15:31).

• Counts it joy simply to be with the Father (Psalm 16:11).

• Rests in sonship, not slavery (Galatians 4:7).


Indicators of a Wrong Heart

• Resentment when others are blessed (Matthew 20:11-15).

• A transactional view: “I did X, so God must do Y” (Malachi 3:14).

• Joyless obedience—going through motions without love (Revelation 2:3-4).

• Pride in spiritual résumé (Philippians 3:6-9).


Cultivating a Right Heart in Service

1. Remember identity: loved children, not hired hands (Romans 8:15-17).

2. Serve from gratitude for grace already received (Titus 2:11-14).

3. Seek the Father’s pleasure above personal reward (Colossians 3:23-24).

4. Celebrate God’s mercy toward others—proof the family is healthy (Luke 15:7).

5. Examine motives regularly; the Lord weighs the heart (1 Samuel 16:7).


Key Takeaways

• Right actions without right affections can still miss the Father’s heart.

• God values relationship over mere rule-keeping.

• True service springs from love, gratitude, and delight in the Father’s presence.


Supporting Scriptures

1 John 5:3 — “For this is the love of God: that we keep His commandments. And His commandments are not burdensome.”

2 Corinthians 5:14 — “For Christ’s love compels us…”

Micah 6:8 — “He has shown you… what is good… to act justly, love mercy, and walk humbly with your God.”

How does the elder son's complaint connect to the Pharisees' attitudes in Luke?
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