Building on the Foundation: Your Life’s Work Will Be Tested
1 Corinthians 3:5–15
Jacob William Lee
Reaching Africa’s Unreached
5 After all, who is Apollos? Who is Paul? We are only God’s servants through whom you believed the Good News. Each of us did the work the Lord gave us. 6 I planted the seed in your hearts, and Apollos watered it, but it was God who made it grow. 7 It’s not important who does the planting, or who does the watering. What’s important is that God makes the seed grow. 8 The one who plants and the one who waters work together with the same purpose. And both will be rewarded for their own hard work. 9 For we are both God’s workers. And you are God’s field. You are God’s building.
10 Because of God’s grace to me, I have laid the foundation like an expert builder. Now others are building on it. But whoever is building on this foundation must be very careful. 11 For no one can lay any foundation other than the one we already have—Jesus Christ.
12 Anyone who builds on that foundation may use a variety of materials—gold, silver, jewels, wood, hay, or straw. 13 But on the judgment day, fire will reveal what kind of work each builder has done. The fire will show if a person’s work has any value. 14 If the work survives, that builder will receive a reward. 15 But if the work is burned up, the builder will suffer great loss. The builder will be saved, but like someone barely escaping through a wall of flames.
1 Corinthians 3:5–15 (Africa Study Bible- NLT Anglicized English)
Introduction
Do words like judgment day, fire, reward, work, value, suffer great loss, and escaping through a wall of flames make you uneasy?
- They should. Paul is not trying to make us comfortable; he is trying to make us careful.
I still remember the pressure of final exams in college and graduate school, construction inspections in Seguin, Texas, and Reaching Africa’s Unreached annual Ugandan government audits. Each one carried its own kind of anxiety. Did I prepare enough? Did I meet the required code? Have we complied with every law?
- Many of us know that feeling. A final exam, an inspection, and an audit all force you to ask whether what you built can hold up under review. But Paul is talking about a far more serious examination, and here is the sobering truth: you cannot cram for this exam.
In one sense, it is already underway. It began when we were saved, and it continues through the way we live each day. That is why this passage matters. Paul is calling us to build wisely, faithfully, and for eternity.
Every life—your life and my life—is being built on something. The question is not whether we are building, but what we are building on, and whether our work will survive the fire of verses 13–15.
First Corinthians addresses’ ten major issues and several lesser concerns in a church marked by division, immaturity, and disorder. Today’s passage is both a correction and an invitation to return to what is central, eternal, and unshakable.
Paul’s Correction
One general observation shaped Paul’s correction of the Corinthians. I call it the “sandwich” approach to correction. Paul does not correct them in anger; he writes as a shepherd seeking to restore a troubled church. He begins with blessing and encouragement in chapter one, and he closes tenderly in 1 Corinthians 16:24: “My love to all of you in Christ Jesus.”
- Paul had received troubling reports that believers in Corinth had turned ministry into a competition. They were arguing over which leader to follow and whose teaching was most impressive, aligning themselves with Peter, Apollos, or Paul. Does this problem still exist in the church today? Yes.
Paul cuts straight to the heart of the matter: Christ is not divided. The central issue is not personality or popularity, but whether we are building on Christ and whether what we build will last.
It should also shape how we correct others. Truth without love can wound, but truth expressed in love can heal and restore.
Our text today confronts us with a sobering but essential question: What are we building—and will it last?
*Before we move on let us be clear: these verses do create tension, but it is a good and necessary tension.
Ephesians 2:8–9 teaches that we are saved by grace alone through faith alone, not by works. We do not earn our salvation, and we do not keep ourselves saved by our works either.
Romans 8:1 assures us that there is no condemnation for those who are in Christ Jesus, and John 10:28–29 gives believers this sweet comfort when Jesus says, “I give them eternal life, and they will never perish. No one can snatch them away from me, for my Father has given them to me, and he is more powerful than anyone else. No one can snatch them from the Father’s hand.”
A person who is “born again” cannot be “unborn”
So, Scripture is crystal clear: salvation is a gift of God’s grace from beginning to end.
Story Illustration
Every builder knows that quality matters more than speed. In Reaching Africa’s Unreached projects—whether constructing buildings or training believers—I often emphasize that “slowly by slowly” is usually the best way forward. I repeatedly remind our co-workers, “Let us build things that will last until Jesus returns.”
- We are all building something, whether we realize it or not. The question is whether we are building wisely, faithfully, and for eternity.
- A Christian’s present day actions have eternal consequences (vs.13-15)
I. Verses 5–11 Teach That There Is Only One Foundation.
Paul begins with a vital correction: ministry is never about personalities, tribes, clans, or political parties competing for honor. It is about God building something eternal through His servants. The church belongs to Christ, not to Paul, Apollos, or any modern leader. If we miss this, we will misunderstand everything else in the passage.
“After all” (v.5) points us back… We must study all passages in context. The Bible is not like a “treasure chest” with jewels in it we pull out randomly to suit our perceived needs. Greek terms-Exegesis vs. Eisegesis
Storyline of the Bible: Creation–>Fall–>Redemptionà Consumation
Important when proclaiming gospel. Example- just don’t share John 3:16 and have people say a prayer
The Foundation Is Jesus Christ Alone- Jesus is building his church-Matthew 16:18
Paul is emphatic in 1 Corinthians 3:11: “No one can lay any foundation other than the one we already have—Jesus Christ.”
Foundation: 1 Corinthians 1:18-30. See also Africa Study Bible note “Keep Jesus’ Sacrifice Central” pg.1663
Watch Paul Washer video on gospel presentation. “Where to Begin with the Gospel?” by I Paul Washer: https://www.youtube.com/watch?v=ytaYeDXN-Ro
Every ministry, every church, and every Christian life must rest on Him—not on a personality, a program, a family line, or clan heritage. Christ is not one option among many; He is the only foundation that can bear the weight of eternity.
“The wise man built his house on the rock, and the storms came, but the house stood because it was anchored deep. The foolish man built on sand, and when the storm came, great was its fall.” Matthew 7:24–27
- The issue is not whether storms will come; they will come. The issue is whether our lives are built on the Rock, the foundation who is Christ Jesus.
- God does not take short cuts- “Slowly by slowly”
God’s Workers Are Partners, Not Rivals
In verse 8, Paul writes, “The one who plants and the one who waters work together with the same purpose.” Paul and Apollos were not competitors but co-workers. One planted the seed and another watered it, but God alone gave the growth.
- Paul develops the same truth through the image of the body in 1 Corinthians 12:12–27. No servant of God can boast as though ministry fruit came from human ability alone. Paul says in 1 Corinthians 3:10 that he built “because of God’s grace to me.”
- See Africa Study Bible note “Unity and Diversity” pg.1662. Ugandan Proverb “A united family eats from the same plate” and Nigeria proverb: “In the moment of crisis, the wise build bridges and the foolish build dams”
- See 2 Timothy 4:1-4- “Preach the word in season and out of season….”
Division grows when we forget that we serve the same Lord and pursue the same goal. When Carol and I write newsletters, we link to partner ministries whenever possible, honoring our shared gospel mission as co-workers, not competitors.
- Sadly, churches often divide when believers become more loyal to a style, personality, or tradition than to Christ. God’s kingdom advances when His servants embrace their roles, honor one another, and depend on the Holy Spirit for fruit. As Zechariah 4:6 says, “It is not by force nor by strength, but by my Spirit, says the Lord of Heaven’s Armies.”
Paul also reminds us that each person is rewarded for his own labor in 1 Corinthians 3:8. God does not compare your calling to someone else’s calling, or your service to someone else’s influence. He evaluates faithfulness to the task He gives us.
- This truth both humbles us and sets us free. It humbles us because we cannot claim credit for the growth God alone produces. It frees us because we do not have to compete with others to prove our worth.
Faithfulness is success in God’s economy. Luke 16:10 says, “If you are faithful in the little things, you will be faithful in the big things.” J. I. Packer said it well: “Our part is faithfulness; God’s part is fruitfulness.”
If Christ is the only foundation, then the next question is obvious: how are we building on Him? Not everything built on a good foundation is a good building. A foundation can be sound, yet the structure above it can still be careless, weak, or wasteful.
Study the Word- 2 Timothy 2:15 “Work hard/study hard so you can present yourself to God and receive his approval. Be a good worker one who does need to be ashamed and who correctly handles the word of truth”à Gold, silver, and precious stones”
Mud Mortar and Endurance
Mud mortar may hold bricks temporarily, but rain and pressure weaken it and create hidden termite pathways. We have seen this at RAU, in village churches and homes, and on Metu Mountain, where termites damaged wooden support poles. What appears secure for a season may not be built to endure.
In the same way, some work in life and ministry appears stable for a season, but only what is built with truth, humility, and obedience will truly endure.
II. Verses 12–13 Teach That Not All Building Materials Are Equal
Paul now moves from the foundation to the materials used to build upon it. A life may be founded on Christ yet still be constructed with inferior materials. In verses 12–13, the issue is not only whether Christ is your foundation, but also whether your daily life, service, and ministry are shaped by what will last for eternity.
Two Categories of Building Materials
Paul contrasts two groups of materials:
- Durable and costly: gold, silver, and precious stones. Represent Spirit empowered, Christ-centered, motivated by love…these are precious in God’s sight
- Temporary and combustible: wood, hay, and straw. Represent shallow self-serving, for applause, self-image, large but hallow, very public but polluted by pride.
This contrast is not about whether a person is saved. It concerns the substance of our labor and the quality of our stewardship before God. Gold, silver, and precious stones represent Spirit-empowered, eternity-minded work, including:
- teaching sound doctrine;
- discipling others with patience;
- serving with humility;
- giving sacrificially;
- praying earnestly;
- forgiving deeply; and
- living with integrity.
This work endures because it requires faith, discipline, and dependence on God. It reflects Christ’s character and rests on His Word. The mission and vision statements of Reaching Africa’s Unreached reflect this reality. In short, RAU acknowledges that missionary work cannot be accomplished in our own strength, but only through the supernatural power of the Holy Spirit.
The means He uses in His people are cross-centered living, sacrificial and loving service, Bible-soaked preaching and teaching, fervent intercessory prayer, and Christlikeness.
Wood, hay, and straw represent temporary, superficial, self-serving work. Ministry driven by applause, ambition, image, control, or empire-building may impress now, but it will not last. This kind of work fails God’s test.
It may fill a room, attract attention, or build a platform, yet it cannot survive God’s refining test described in our text. The problem is not always an obviously sinful activity; sometimes it is a good action performed for the wrong reason—a sermon that is eloquent but empty, service that is organized but loveless, or a gift that is generous but self-promoting.
In Matthew 6:1–6, Jesus warns against righteous acts done for human approval. The Father sees and rewards what is done in secret.
Faithful service aligns our actions and motives with God’s purposes. We may do right for selfish reasons or pursue sincere goals with shallow methods, but 1 Samuel 16:7 reminds us that God sees both the outward act and the heart.
- Was it faithful?
- Was it true?
- Was it loving?
- Was it done for the glory of Christ?
These questions take us beyond the shallow measure of visible success and reveal whether we are building with gold or straw. This brings us to verses 13–15. The materials matter because a day is coming when every work we do as Christians will be tested.
III. Verses 13–15 Teach That Every Work of the Christian Will Be Tested by Fire
Paul now turns from construction language to examination language. The day will come when what we have built is not merely observed but tested. What looked impressive in human eyes will be revealed for what it truly is in God’s presence. This is a serious reminder that appearances are not the same as reality.
Remember again God’s word to the prophet Samuel: “Man looks at the outward appearance, but the Lord looks at the heart.”
The Day of Judgment Will Reveal the Quality of Every Work
Paul writes in 1 Corinthians 3:13, “On the judgment day, fire will reveal what kind of work each builder has done.” He repeats this truth in 2 Corinthians 5:10: “For we must all stand before Christ to be judged. We will each receive whatever we deserve for the good or evil we have done in this earthly body.”
Important to Remember: This judgment does not determine whether a person is saved. Rather, it examines the substance of our labor and the quality of our stewardship before God. Fire tests, exposes, and reveals what is genuine and what is merely decorative.
God evaluates the quality of our work, not merely its appearance. He is not impressed by size, volume, or public recognition. He is pleased by faithfulness, obedience, and Christ-centered labor.
As Thomas Schreiner helpfully emphasizes in his commentary on First Corinthians, God gives the growth. What we do matters, and why we do it matters, but the fruit ultimately depends on Him. This truth should humble us, keep us prayerful, and remind us that we are not the source of the harvest. We are servants entrusted with the work.
Faithful Work Will Endure and Be Rewarded
Paul writes in 1 Corinthians 3:14, “If the work survives, that builder will receive a reward.” Faithful, Spirit-led labor will be refined rather than destroyed and honored by God—even when it seems small or goes unnoticed by others.
- a parent faithfully praying for a child;
- a believer visiting and caring for the sick;
- a worker acting with integrity in a difficult job; and
- a believer persevering in private prayer that only God sees.
- Continued faithful evangelism even when one does not see much or even any fruit
- “There is no success without sacrifice. If you succeed without sacrifice it is because someone before you sacrificed. If you sacrifice without success it is because someone will succeed after you” Adoniram Jackson 1788-1850
No act of love is overlooked. In Matthew 10:42, Jesus teaches that even a cup of cold water given in His name will not go unrewarded. The point is that God never overlooks anything done in love. Whatever is done for Christ, in Christ, and by faith in Christ is never a waste of time.
This reward is best understood as God’s response to faithful builders whose work withstands His evaluation. Neither this passage nor the rest of Scripture specifies the reward’s exact form, so we should not speculate. The reward is real, future, and connected to faithful service.
What we do now in the Lord and for Him will echo throughout eternity!
The Worker Is Saved, But Worthless Work Is Lost
Paul writes in 1 Corinthians 3:15: “If the work is burned up, the builder will suffer great loss. The builder will be saved, but as one who barely escapes through a wall of flames.” This is a sobering loss. The believer’s salvation remains secure, yet a lifetime of labor may be exposed as empty and without eternal value.
We are secure in Christ and, at the same time, accountable for our work. Romans 8:1 assures us that there is no condemnation for those who are in Christ Jesus. Even so, believers can suffer the loss of reward, honor, and opportunities that could have been offered to Christ.
The story of the three little pigs can illustrate this principle, provided we use the comparison carefully. A structure may look secure yet collapses under pressure because it was not built to endure. Appearances can deceive, but God’s judgment is perfect and fair. This warning in verses 13–15 should stay with us.
When I heard Leonard Ravenhill preach on this text in the late 1970s, he said, “Some people will enter heaven only with the smell of smoke on them.” That phrase has remained with me for decades because it captures the seriousness of this passage. A person may belong to Christ and still live carelessly, spending years on pursuits with no eternal value.
Conclusion: Build for What Will Last Throughout Eternity
This is a call for every believer. Paul’s question is not, “How much did you do?” but “What was it made of?” God measures quality rather than quantity, faithfulness rather than fame, and divine approval rather than human applause.
This passage speaks to every believer, family, ministry, and church. Jesus commands us in Matthew 6:19–21 to lay up treasures in heaven. That is the enduring work set before us.
Building on the Unshakable Foundation
Our call as Christians is to build on the unshakable foundation. The foundation has already been laid Jesus Christ is sufficient and unshakable. The question that remains is what we will build on Him.
- Will we build lives marked by prayer and truth, holiness and generosity, and enduring love?
- Or will we settle for what is easy, visible, and temporary?
What we do in the Lord and for Him will echo throughout eternity to His praise and honor. Everything else is dust in the wind.
“I am sure that none of us will say when in heaven that we prayed too much, sacrificed too much, proclaimed the gospel too much, or were too passionate to get the gospel to those who have little to no access to this gospel of grace. Let us together press on to make it our ambition to preach the gospel where Christ has not been named.”
Faithfulness in Service
1 Timothy 4:16 “Keep a close watch on how you live and on your teaching. Stay true to what is right for the sake of your own salvation and the salvation of those who hear you.”
Psalm 139:23–24 exhorts us to ask the Holy Spirit to search us, correct us, and purify our service.
And we can take courage in this truth: faithfulness hidden from human eyes is never hidden from God.
The joy of faithful service is this: one day, our life’s work will not be ashes, but treasure laid before the throne of God. What joy it will be to hear from Jesus,
“Well done, good and faithful servant” (Matthew 25:21).
Faithful Acts
- Parents rise early to provide for their family, pray for their children, and open the Bible with them.
- A believer repairs a neighbor’s window or a widow’s door, sweeps the compound of sick neighbor, fetches water for someone who had accident…
- A congregation gives faithfully so missionaries can train local leaders and plant churches among unreached peoples.
- A believer continues to speak in kindness the gospel to the person who is abusive
- Everyone does their part in an open-air evangelism outreach
- What can you add as examples?
These are gold, silver, and precious stones.
A Life Built on Christ
What survives is a life built on and spent for Christ—in prayer, generosity, humility, courage, evangelism, discipleship, and endurance.
- These are the fruits of the gospel of sovereign grace.
