Christians: The Call to Spiritual Maturity

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The Tragedy of Remaining Infants in Christ

Hebrews 5:14 presents a solemn reality: “But solid food is for the mature, who because of practice have their senses trained to discern good and evil.” This verse stands in stark contrast to the preceding rebuke found in Hebrews 5:11–13, where the inspired writer laments that his audience has become “dull of hearing” and remains unskilled in “the word of righteousness.” The tragedy exposed here is not ignorance due to lack of opportunity but stagnation due to complacency. The believers addressed had been in the faith long enough to be teachers, yet they remained spiritual infants.

Remaining in such immaturity is not harmless. It leaves one vulnerable to error, unstable in faith, and easily swayed by worldly influence or false teaching. Paul expressed the same concern in Ephesians 4:14, warning against being “tossed here and there by waves and carried about by every wind of doctrine.” Spiritual infancy results in dependency upon others for understanding and direction rather than developing one’s own discernment grounded in Scripture. Such immaturity hinders fruitfulness, quenches spiritual growth, and prevents the believer from fully aligning with Jehovah’s purpose.

The inspired rebuke reminds every Christian that immaturity is a condition of willful neglect. The early disciples faced persecution, hardship, and temptation, yet their call remained the same: to grow “in the grace and knowledge of our Lord and Savior Jesus Christ” (2 Peter 3:18). Failure to advance in understanding and obedience not only dishonors God but endangers one’s spiritual stability. Remaining infants in Christ is not a neutral state—it is regression.


God’s Design for Growth and Discernment

Jehovah’s design for spiritual growth is deeply practical and progressive. Growth is not achieved through mystical experience or emotional fervor but through the steady assimilation and application of His Word. Spiritual maturity begins with new birth through faith in Christ and continues through disciplined learning, consistent obedience, and tested discernment.

From creation onward, God’s design has always included growth toward maturity. The natural order mirrors this principle: an infant must become an adult; a seed must grow into a fruitful tree. Likewise, those who are born of the Spirit must develop into men and women of faith who think and act in harmony with God’s revealed will. Peter urges believers, “Like newborn babies, long for the pure milk of the word, so that by it you may grow in respect to salvation” (1 Peter 2:2).

Yet this growth is not automatic. It requires consistent feeding upon the Scriptures and a heart willing to be corrected. Hebrews 12:11 explains that God’s discipline produces “the peaceful fruit of righteousness to those who have been trained by it.” This word trained (Greek: gumnazō) carries the sense of exercise or rigorous practice, implying sustained effort. Maturity is the product of spiritual exercise—learning, obeying, failing, repenting, and persevering.

Jehovah does not intend that any believer remain stagnant. The path of righteousness (Proverbs 4:18) is one of increasing light. Spiritual discernment sharpens as one walks daily in obedience and prayerful meditation on the Scriptures. Growth in grace involves increasing conformity to Christ’s mind and values until the believer becomes capable of discerning good and evil with clarity.


Understanding “Meat” Versus “Milk” Doctrine

The contrast between “milk” and “solid food” in Hebrews 5:12–14 is one of the most misunderstood metaphors in Scripture. Milk refers to the foundational truths of the faith—those essential teachings concerning repentance, faith toward God, baptism, resurrection, and judgment (Hebrews 6:1–2). These truths are indispensable for new believers but are meant as a beginning, not an end.

“Solid food,” on the other hand, represents the deeper comprehension of God’s purposes, the full counsel of His will revealed through Christ, and the practical wisdom that comes from applying doctrine in daily life. It is not merely intellectual depth but moral and spiritual discernment exercised through obedience. The mature believer does not abandon the basics but builds upon them, moving from knowledge to wisdom.

Paul’s teaching in 1 Corinthians 3:1–3 illustrates the same truth. He wrote, “I gave you milk to drink, not solid food; for you were not yet able to receive it.” The Corinthians’ divisions, envy, and worldliness demonstrated that they were “still fleshly.” Thus, maturity is not measured by the quantity of one’s knowledge but by the quality of one’s obedience. Solid food nourishes those who are spiritually disciplined enough to digest it.

The tragedy occurs when believers confuse emotional excitement or speculative theology with true spiritual meat. The mature Christian hungers for sound doctrine that transforms conduct, not mere novelty or intellectual stimulation. As Proverbs 2:1–5 declares, discernment belongs to those who “receive My words and treasure My commandments.” The Word of God, rightly divided, must be internalized, practiced, and defended—only then does it become nourishment that strengthens the believer for every good work.


The Role of Obedience in Maturity

Obedience is the engine of spiritual growth. Knowledge without obedience produces arrogance, but obedience produces wisdom. Jesus declared in John 7:17, “If anyone is willing to do His will, he will know of the teaching.” Spiritual understanding is inseparable from submission to God’s authority. The believer who continually obeys what he already knows will receive greater insight into deeper truths.

The pattern of Scripture is consistent: blessing follows obedience. James 1:22–25 warns that hearing without doing leads to deception. The mature believer does not merely admire truth but conforms his conduct to it. Maturity is proven not by eloquence or doctrinal fluency but by consistent conformity to Christ’s character.

Abraham exemplified this principle. When tested by Jehovah, he obeyed promptly, even when the command appeared incomprehensible (Genesis 22:1–3). His faith matured through obedience. Likewise, the Hebrew believers were called to perseverance amid hardship, demonstrating genuine maturity through steadfast obedience despite suffering.

The process of obedience refines discernment. Each act of faith-based obedience strengthens the believer’s ability to recognize righteousness, resist evil, and trust Jehovah’s promises. The spiritually mature Christian no longer requires external motivation to do what is right; he delights in the law of God from the heart (Psalm 40:8; Romans 7:22).


Discerning Good and Evil in a Corrupted World

Hebrews 5:14 explicitly links maturity to discernment: “who because of practice have their senses trained to discern good and evil.” Spiritual discernment is the capacity to evaluate everything by the standard of God’s Word. It is not intuition but illumination—the result of minds renewed by Scripture and consciences governed by truth.

The world has inverted moral values, calling evil good and good evil (Isaiah 5:20). In such a context, discernment becomes essential for survival. Without it, believers are easily deceived by emotional appeal, cultural trends, or false teachers masquerading as servants of righteousness (2 Corinthians 11:13–15). The mature believer measures all things by the Word of God, refusing to compromise or reinterpret divine standards for social acceptance.

Discernment involves both recognition and rejection. It recognizes what is right according to Scripture and rejects what contradicts it. The believer trained in discernment tests every idea, impulse, and influence against the unchanging truth of God’s Word (1 Thessalonians 5:21). Such testing must be habitual—“because of practice.” The more one obeys truth, the sharper discernment becomes.

In a world desensitized by sin, only those grounded in Scripture can perceive moral reality clearly. The spiritually mature believer grieves over evil rather than tolerates it and delights in righteousness rather than mocks it. His conscience is calibrated by divine revelation, not by human opinion.

Book cover titled 'If God Is Good: Why Does God Allow Suffering?' by Edward D. Andrews, featuring a person with hands on head in despair, set against a backdrop of ruined buildings under a warm sky.

Developing Spiritual Stability and Conviction

Spiritual maturity results in stability and conviction. The mature Christian is not easily shaken by adversity or seduced by error because his faith rests upon tested truth. Colossians 2:6–7 commands believers to be “firmly rooted and now being built up in Him and established in your faith.” Stability flows from consistent nourishment on the Word and unyielding confidence in Jehovah’s sovereignty.

Conviction is the fruit of maturity. It is the settled assurance that God’s Word is absolute truth, irrespective of circumstance or opposition. Daniel demonstrated this stability when he refused to defile himself with the king’s food (Daniel 1:8). His conviction was not situational but anchored in obedience to Jehovah’s law. Similarly, Paul remained steadfast through persecution because his faith was not built on emotional zeal but on the knowledge of Christ and the certainty of resurrection hope (2 Timothy 1:12).

Spiritual maturity transforms wavering believers into steadfast disciples. They no longer drift between opinions or compromise under pressure. Their speech, conduct, and choices reflect the mind of Christ (Philippians 2:5). They live with moral clarity in a confused world, shining as lights of truth amid darkness.

Ultimately, the call to spiritual maturity is the call to Christlikeness. It is a lifelong pursuit of growth through knowledge, obedience, and discernment until the believer is “complete in Christ” (Colossians 1:28). The mature believer delights in Jehovah’s truth, resists evil with courage, and stands immovable in faith, bearing fruit that honors God both now and forever.

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About the Author

EDWARD D. ANDREWS (AS in Criminal Justice, BS in Religion, MA in Biblical Studies, and MDiv in Theology) is CEO and President of Christian Publishing House. He has authored over 220+ books. In addition, Andrews is the Chief Translator of the Updated American Standard Version (UASV).

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