¹ But I, brothers, could not address you as spiritual people, but as people of the flesh, as infants in Christ. ² I fed you with milk, not solid food, for you were not ready for it. And even now you are not yet ready, ³ for you are still of the flesh. For while there is jealousy and strife among you, are you not of the flesh and behaving only in a human way? ⁴ For when one says, “I follow Paul,” and another, “I follow Apollos,” are you not being merely human?

⁵ What then is Apollos? What is Paul? Servants through whom you believed, as the Lord assigned to each. ⁶ I planted, Apollos watered, but God gave the growth. ⁷ So neither he who plants nor he who waters is anything, but only God who gives the growth. ⁸ He who plants and he who waters are one, and each will receive his wages according to his labor. ⁹ For we are God’s fellow workers. You are God’s field, God’s building. – 1 Corinthians 3:1-9 ESV

There is nothing particularly wrong with acting like a child – if you are one. But we all know how awkward it is to be around someone who refuses to act their age. Watching a grown man behave like a teenager is painful and extremely disappointing. It’s obvious to all that something is wrong with his behavior. He has refused to grow up and own up to the responsibilities that come with adulthood, and his immature actions usually end up impacting every area of his life.

The same can be said for spiritual immaturity. It’s not that it’s wrong. Every believer starts out as a spiritual infant in Christ. We begin the journey of faith as metaphorical newborns who require what Paul refers to as the “milk” of God’s Word. This is normal, natural, and to be expected. It was Peter who wrote, “Like newborn infants, long for the pure spiritual milk, that by it you may grow up into salvation” (1 Peter 2:2 ESV). There is a time in every believer’s life when their spiritual diet must be simple and easily digestible. But as they grow, they must move on to the “meat” of the Word. They are to grow up into salvation, learning to grasp the depth of God’s love, the significance of His grace, their complete dependence upon His strength, and the full weight of His call to holiness. The author of the book of Hebrews had some strong words to say to the recipients of his letter:

You have been believers so long now that you ought to be teaching others. Instead, you need someone to teach you again the basic things about God’s word. You are like babies who need milk and cannot eat solid food. For someone who lives on milk is still an infant and doesn’t know how to do what is right. – Hebrews 5:12-13 NLT

They were stuck on the basics, the elemental principles of God’s Word. They knew that Jesus was the Son of God and that He had died for their sins. They also understood their complete dependence upon Him for salvation. In placing their faith in Jesus, they believed they would be restored to a right relationship with God the Father. But their knowledge of God’s Word had not gone beyond that point. Their grasp of all that God had done and all that He had in store for them remained limited, and their behavior remained so as well.

Paul gave the Ephesian believers a goal to “be mature in the Lord, measuring up to the full and complete standard of Christ” (Ephesians 4:13 NLT). He expected them to grow in Christ-likeness, becoming increasingly more like Him in their daily conduct. The result of this spiritual growth would be clearly evident.

Then we will no longer be immature like children. We won’t be tossed and blown about by every wind of new teaching. We will not be influenced when people try to trick us with lies so clever they sound like the truth. Instead, we will speak the truth in love, growing in every way more and more like Christ, who is the head of his body, the church. – Ephesians 4:14-15 NLT

The problem with the believers in Corinth was that their behavior was revealing their spiritual immaturity. They were bickering, boasting, fighting, and fuming over who was more spiritual based on which teacher they followed. Paul exposed the shallow and immature nature of their behavior. “There is jealousy and strife among you,” he wrote, and that was proof that they were “of the flesh and behaving only in a human way” (1 Corinthians 3:3 ESV). They were acting like children, arguing over things that didn’t matter and revealing their lack of understanding of God’s ways.

They were making much of men rather than making much of God. They misunderstood that their spiritual mentors were merely messengers who had been acting on behalf of God. This led Paul to ask, “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” (1 Corinthians 3:5 ESV). They were nothing more than instruments in God’s hands. Their value came from God’s decision to use them to accomplish His will. In a subsequent letter to the Corinthians, Paul reemphasized his understanding of his role as a supporting cast member. 

You see, we don’t go around preaching about ourselves. We preach that Jesus Christ is Lord, and we ourselves are your servants for Jesus’ sake. For God, who said, “Let there be light in the darkness,” has made this light shine in our hearts so we could know the glory of God that is seen in the face of Jesus Christ. We now have this light shining in our hearts, but we ourselves are like fragile clay jars containing this great treasure. This makes it clear that our great power is from God, not from ourselves. – 2 Corinthians 4:5-7 NLT

Mature believers have a growing awareness that God is the source of all that we enjoy regarding our faith. It was He who called us. It was His Son who died for us. It was His Spirit who opened our eyes so that we could understand the truth of the gospel. It is His Word that provides us with insight into His nature and daily guidance for our journey of faith. And it is God who provides His Church with apostles, prophets, evangelists, pastors, and teachers “to equip God’s people to do his work and build up the church, the body of Christ” (Ephesians 4:12 NLT).

Paul reminded the believers in Corinth that he, Cephas, and Apollos were nothing more than “God’s fellow workers” and they were “God’s field, God’s building” (1 Corinthians 3:9 ESV). Maturing believers have a growing understanding of and appreciation for God’s work in their lives. Over time, their appreciation for His love and mercy increases as they experience His grace and mercy. They grow in their gratitude for His unfailing forgiveness. They grow in their desire to please Him, not to earn His love, but to express gratitude for His love. They grow in their dependence upon Him. They grow in their desire for Him. They grow in their hunger for His Word. They grow in their trust in His promises. They grow into their salvation. And all this growth shows up in their behavior.

Father, You don’t just expect me to grow, You have provided everything I need to see that it happens. You are the source of everything. You alone have provided the means for my salvation and sanctification, and, one day, You will bring about my future glorification. Your Spirit convicts, comforts, guides, and produces His fruit through me. Through Your Word, You reveal Yourself to  me. I owe everything to You., including my capacity to grow up in my salvation. I am completely dependent upon You, and I believe that You will complete what You started in my life. As Paul told the Philippians believers, “God, who began the good work within you, will continue his work until it is finally finished on the day when Christ Jesus returns” (Philippians 1:6 NLT). Keep me focused on Your faithfulness and totally reliant upon Your goodness, grace, mercy, and love. So that I will continue to grow up and stand out for You. Amen

English Standard Version (ESV) The Holy Bible, English Standard Version. ESV® Permanent Text Edition® (2016). Copyright © 2001 by Crossway Bibles, a publishing ministry of Good News Publishers.