THE VANITY OF THE OLD MIND

THE VANITY OF THE OLD MIND

By Rev. Samuel Arimoro

Main Text: Ephesians 4:17-24

Key Verse: “This I say therefore, and testify in the Lord, that ye henceforth walk not as other Gentiles walk, in the vanity of their mind.” — Ephesians 4:17 (KJV)

Supporting Texts: Romans 12:1-2; Ephesians 2:1-3; Colossians 3:1-10; Proverbs 23:7; 2 Corinthians 10:4-5; Philippians 4:8.

Description: This sermon examines the emptiness of the unrenewed mind and teaches believers how to abandon worldly thinking, embrace the mind of Christ, and live in accordance with God's Word.

INTRODUCTION

The mind is one of the most important battlegrounds in the life of a believer. Before a person's actions become visible, they are often preceded by thoughts, imaginations, beliefs and decisions. What occupies the mind eventually influences the direction of life. A person who consistently thinks according to the standards of a sinful world will eventually find it difficult to live according to the standards of God's kingdom.

In Ephesians 4:17, Paul solemnly charges believers not to continue walking as the Gentiles walk, in the vanity of their minds. The word vanity describes emptiness, futility, worthlessness or a way of thinking that fails to produce what is spiritually valuable. Paul is not condemning education, intelligence or the proper use of human reasoning. He is warning against a mind that operates independently of God, rejects His truth and pursues life without submitting to His will.

When a person receives Jesus Christ, the spirit is made alive, but the believer must also allow the Word of God to renew the mind. Salvation is not merely a change of religious association; it is a transformation of the heart, thoughts, values and conduct. God does not want us to carry the old world's mentality into our new life in Christ. He calls us to reject empty thinking and develop a mind that is governed by His truth.

1. THE OLD MIND THINKS WITHOUT SUBMITTING TO GOD

The old mind is a mind that makes decisions without considering God's will, Word or purpose. It may be intelligent, educated and influential, yet remain spiritually unwise because it refuses to acknowledge God's authority. The problem is not that the person thinks, but that the person thinks independently of the One who created the mind.

A mind separated from God's truth may consider evil acceptable, pride desirable and disobedience reasonable. It may measure success by possessions, status and human applause while neglecting righteousness, holiness and eternal life. The believer must therefore learn to bring every thought and decision under the authority of Christ.

a. The old mind ignores the counsel of God (Proverbs 3:5-6)

“Trust in the LORD with all thine heart; and lean not unto thine own understanding. In all thy ways acknowledge him, and he shall direct thy paths.” — Proverbs 3:5-6 (KJV)

Human understanding is limited. We do not know everything about tomorrow, the consequences of every decision or the hidden dangers along our paths. When people rely exclusively on their own understanding, they can mistake confidence for wisdom and personal desire for divine direction.

God does not forbid us from reasoning; He commands us to acknowledge Him in our reasoning. The renewed mind consults Scripture, seeks godly counsel and remains sensitive to the leading of the Holy Spirit. We must not allow personal opinions to become more authoritative than God's Word.

b. The old mind makes human wisdom its final authority (1 Corinthians 3:19)

“For the wisdom of this world is foolishness with God. For it is written, He taketh the wise in their own craftiness.” — 1 Corinthians 3:19 (KJV)

Human wisdom has its proper place, but it cannot replace divine wisdom. A person may know how to make money and yet lack the wisdom to manage it righteously. Another may understand human relationships but fail to practise forgiveness. Knowledge without submission to God can increase pride rather than produce godliness.

The believer must evaluate popular ideas by the standard of Scripture. We should not accept something merely because it is fashionable, widely practised or approved by influential people. The question is not simply, “Is this acceptable to society?” but, “Is this pleasing to God?”

c. The old mind resists divine correction (Proverbs 12:1)

“Whoso loveth instruction loveth knowledge: but he that hateth reproof is brutish.” — Proverbs 12:1 (KJV)

A mind filled with pride finds it difficult to receive correction. Such a person interprets every rebuke as an attack, every disagreement as disrespect and every instruction as an attempt to control them. This attitude prevents growth because the person refuses to learn from mistakes.

A renewed mind is teachable. It recognises that correction can be an instrument of God's grace. Whether correction comes through Scripture, a mature Christian, a spiritual leader or the consequences of a poor decision, we should examine it humbly and respond with wisdom.

d. The old mind pursues its own way above God's will (Isaiah 53:6)

“All we like sheep have gone astray; we have turned every one to his own way; and the LORD hath laid on him the iniquity of us all.” — Isaiah 53:6 (KJV)

The old nature wants to be its own master. It says, “I will do what I want, when I want, and in the way I want.” This mentality may appear to be freedom, but it often leads to bondage because it refuses to recognise the wisdom and boundaries established by God.

Christian maturity requires surrender. Jesus taught us to pray, “Thy will be done” (Matthew 6:10). We must be willing to abandon a desired course when it contradicts God's Word. The truly renewed mind does not merely ask God to bless its plans; it seeks to align its plans with God's will.

Biblical Example: King Saul (1 Samuel 15:1-23)

Saul received a clear instruction from God but chose to obey selectively. He preserved what God had commanded him to destroy and attempted to justify his disobedience. His reasoning sounded religious, but it did not change the fact that he had rejected God's instruction. His example teaches us that human explanations cannot make disobedience acceptable to God.

2. THE OLD MIND IS FILLED WITH EMPTY AND FUTILE THOUGHTS

The vanity of the old mind is seen in its pursuit of things that cannot satisfy the deepest needs of the soul. It may spend years chasing popularity, wealth, pleasure or recognition while neglecting its relationship with God. Such pursuits are not automatically sinful in themselves, but they become vain when they take God's place or are pursued without regard for His will.

The tragedy of empty thinking is that a person can be busy and still be unfruitful in the things that matter most. A life can be full of activity yet empty of spiritual purpose. God calls us to invest our thoughts, time and energy in things that carry eternal value.

a. The old mind pursues earthly things above eternal things (Colossians 3:2)

“Set your affection on things above, not on things on the earth.” — Colossians 3:2 (KJV)

Earthly responsibilities are important, but they must not become our ultimate focus. Money, property, professional achievement and human recognition cannot replace fellowship with God or prepare a soul for eternity. When earthly things dominate our thoughts, spiritual priorities gradually lose their importance.

Setting our affection on things above means allowing eternal realities to shape our daily decisions. We work diligently, care for our families and fulfil our responsibilities, but we do so with our hearts submitted to Christ. We remember that our possessions are temporary, whereas our relationship with God has eternal significance.

b. The old mind chases satisfaction outside God's purpose (Ecclesiastes 2:10-11)

Solomon pursued pleasure, possessions, accomplishments and great projects. Yet when he considered his achievements apart from their ultimate purpose, he recognised their inability to provide lasting satisfaction.

A person can acquire more and still feel empty. More money does not automatically produce peace; more recognition does not necessarily produce contentment; and more entertainment does not guarantee joy. The human heart was created for fellowship with God, and nothing in creation can permanently replace the Creator.

The lesson is not that achievement is wrong, but that achievement cannot become our god. We must enjoy God's blessings with gratitude while refusing to make them the foundation of our identity.

c. The old mind wastes life on temporary pleasures (1 John 2:15-17)

“And the world passeth away, and the lust thereof: but he that doeth the will of God abideth for ever.” — 1 John 2:17 (KJV)

The world continually advertises pleasure without responsibility, enjoyment without consequences and success without character. The old mind may accept these promises without considering their spiritual cost. What appears attractive today can become a source of regret tomorrow.

Believers must learn to distinguish between what is enjoyable and what is profitable. Not every opportunity deserves our attention, and not every desire should be satisfied. We should ask whether our choices strengthen our faith, protect our character and honour God.

d. The old mind neglects the eternal consequences of decisions (Galatians 6:7-8)

“Be not deceived; God is not mocked: for whatsoever a man soweth, that shall he also reap.” — Galatians 6:7 (KJV)

The old mind often concentrates on immediate benefits without considering future consequences. It asks, “What will I gain now?” rather than, “What will this decision produce in my life, family, ministry and relationship with God?”

Every decision plants a seed. Words, habits, relationships and secret choices contribute to the harvest we eventually experience. A renewed mind learns to think beyond the present moment and chooses what is right even when obedience requires sacrifice.

Biblical Example: The Rich Fool (Luke 12:16-21)

The rich fool planned to expand his storage facilities and enjoy years of ease. His thoughts centred on his possessions and personal comfort, but he failed to prepare for eternity. God called him a fool because he accumulated earthly wealth without becoming rich towards God. His story warns us against building a successful earthly life while neglecting the soul.

3. THE OLD MIND IS DARKENED BY SIN AND SPIRITUAL IGNORANCE

Ephesians 4:18 explains that the understanding of those who walk in spiritual darkness is darkened and that they are alienated from the life of God through ignorance and hardness of heart. Sin does not merely affect behaviour; it also distorts perception. It can make wrong things appear right and make divine truth seem unreasonable.

When a person repeatedly rejects God's light, the conscience may become less sensitive to sin. What once produced conviction may eventually be defended or celebrated. This is why believers must not treat the condition of the mind lightly. We must continually expose our thoughts to the truth of God's Word.

a. Sin blinds the mind to spiritual truth (2 Corinthians 4:3-4)

Paul explains that the minds of unbelievers can be blinded so that the light of the gospel does not shine clearly upon them. Spiritual blindness prevents people from recognising their need for salvation and appreciating the glory of Christ.

This blindness is not overcome by argument alone. We need the proclamation of the gospel, the work of the Holy Spirit and prayer for people to receive the truth. Believers must also guard themselves against the gradual influence of sin, which can weaken spiritual sensitivity.

b. Hardness of heart produces resistance to God (Hebrews 3:12-13)

The heart becomes hardened when a person repeatedly refuses to respond to God's voice. A single act of disobedience may be followed by repentance, but persistent resistance can develop into a settled attitude of rebellion.

We must respond promptly when the Holy Spirit convicts us. If the Word exposes pride, we should humble ourselves. If it reveals bitterness, we should forgive. If it exposes dishonesty, we should repent and make matters right where possible. Prompt obedience keeps the heart tender before God.

c. Spiritual ignorance can lead to destructive choices (Hosea 4:6)

“My people are destroyed for lack of knowledge: because thou hast rejected knowledge, I will also reject thee, that thou shalt be no priest to me...” — Hosea 4:6a (KJV)

God's people can suffer when they lack knowledge of His Word or reject the truth they have received. Ignorance may leave a person vulnerable to deception, poor judgement and unbiblical practices. Spiritual growth therefore requires more than enthusiasm; it requires a sound understanding of Scripture.

We must study the Bible, listen carefully to sound teaching and examine what we hear in the light of God's Word. We should not assume that every spiritual-sounding statement is biblical. Discernment grows as the mind is trained by the truth.

d. Repeated sinful habits can weaken spiritual sensitivity (Ephesians 4:19)

Paul describes people who have become past feeling and have surrendered themselves to uncleanness. The passage reveals the danger of continuing in sin without repentance. What a person repeatedly permits can gradually become easier to practise and harder to abandon.

This is why we must deal with sinful habits early. We should not excuse destructive behaviour as a harmless weakness or postpone repentance until a more convenient time. Through confession, accountability, prayer and dependence on the Holy Spirit, believers can turn away from sin and walk in renewed obedience.

Biblical Example: Pharaoh (Exodus 7-14)

Pharaoh repeatedly resisted God's command to release Israel. Despite witnessing signs and experiencing judgement, he continued to harden his heart. His story illustrates the danger of resisting divine correction. When God speaks, we should not postpone obedience or allow pride to silence conviction.

4. THE OLD MIND MUST BE RENEWED BY THE WORD OF GOD

God's answer to the vanity of the old mind is not merely positive thinking. It is the transformation of our thinking through His truth. Romans 12:2 commands believers not to conform to the pattern of this world but to be transformed by the renewing of the mind. The Christian life involves a continuing process in which our beliefs, values and attitudes are brought into agreement with Scripture.

We cannot consistently live a godly life while feeding our minds on influences that continually oppose godliness. What we read, watch, hear, meditate upon and repeatedly believe can shape our attitudes. Therefore, we must deliberately fill our minds with God's Word and allow it to correct our thinking.

a. The Word of God exposes wrong thinking (Hebrews 4:12)

The Word of God is living and powerful, discerning the thoughts and intents of the heart. Scripture does not merely inform us; it also examines us. It reveals motives, exposes self-deception and identifies attitudes that we might otherwise excuse.

When we read the Bible, we should be willing to let it speak to our personal lives. We must not use Scripture only to correct other people while refusing its correction ourselves. The renewed mind welcomes the searching light of God's Word.

b. The mind must be transformed rather than conformed (Romans 12:2)

“And be not conformed to this world: but be ye transformed by the renewing of your mind, that ye may prove what is that good, and acceptable, and perfect, will of God.” — Romans 12:2 (KJV)

Conformity happens when we allow the surrounding culture to determine our values. Transformation happens when God's truth changes the way we think and live. The believer must resist the pressure to adopt ungodly attitudes merely because they are common in society.

Renewal is a deliberate spiritual responsibility. We must replace lies with truth, pride with humility, bitterness with forgiveness, impurity with holiness and anxiety with trust in God. As the mind is renewed, we become better equipped to discern and obey God's will.

c. We must cast down ungodly imaginations (2 Corinthians 10:4-5)

Paul teaches that spiritual weapons are mighty through God for pulling down strongholds, casting down imaginations and bringing thoughts into captivity to the obedience of Christ.

Not every thought that enters the mind deserves to remain there. Some thoughts must be rejected because they contradict Scripture, encourage sin or undermine faith. We must identify such thoughts, challenge their truthfulness and replace them with what God has revealed.

For example, when fear says that God has abandoned us, we remember His promises. When pride tells us that we need no correction, we remember the call to humility. When temptation presents disobedience as harmless, we remember the holiness of God and the consequences of sin.

d. We must deliberately think on what is spiritually profitable (Philippians 4:8)

Paul instructs believers to think on things that are true, honest, just, pure, lovely and of good report. This is a call to discipline our attention. We cannot always prevent a troubling thought from appearing, but we can choose whether to entertain it, feed it or redirect our minds towards truth.

Develop a habit of reading Scripture, meditating on God's promises, listening to sound teaching and maintaining wholesome conversations. Do not allow gossip, impurity, hatred or constant negativity to dominate your inner life. A mind filled with God's truth is better prepared to respond to life's challenges with faith and wisdom.

Biblical Example: Josiah (2 Kings 22:8-13; 23:1-3)

When the Book of the Law was found and read to King Josiah, he responded with humility and repentance. Rather than dismissing the message, he recognised how far the nation had departed from God's commands. He then led reforms to restore obedience. His example shows how receiving God's Word with a responsive heart can transform personal conduct and influence an entire community.

5. THE BELIEVER MUST PUT OFF THE OLD MAN AND PUT ON THE NEW MAN

Ephesians 4:22-24 teaches believers to put off the former manner of life associated with the old man, be renewed in the spirit of their minds, and put on the new man created after God in righteousness and true holiness. The Christian life is not simply about stopping certain behaviours; it is also about embracing a new way of living under Christ's lordship.

Putting off the old man involves rejecting the sinful patterns of our former life. Putting on the new man means developing the character and conduct that reflect our new identity in Christ. This transformation is made possible by God's grace and the work of the Holy Spirit, while we actively respond through faith and obedience.

a. Put off the former conversation and conduct (Ephesians 4:22)

The word conversation in the King James Version refers to manner of life or conduct. Paul calls believers to lay aside the old way of living, which is corrupted by deceitful desires. This includes sinful speech, dishonesty, sexual immorality, bitterness, pride and every practice that contradicts the character of Christ.

We must not allow our past to become an excuse for continuing in sin. In Christ, there is grace to repent, change direction and develop new habits. The believer should regularly examine personal conduct and ask, “What must I put away so that my life will honour the Lord?”

b. Be renewed in the spirit of your mind (Ephesians 4:23)

The renewal of the mind is central to lasting transformation. A person may stop an outward behaviour temporarily while still retaining the attitudes that produced it. Without inward renewal, old patterns may return when pressure increases.

God wants truth to change us from within. We must learn to view people through the lens of love, success through the lens of stewardship, trials through the lens of faith and obedience through the lens of devotion to Christ. As our thinking changes, our choices and conduct begin to reflect that transformation.

c. Put on the new man in righteousness and holiness (Ephesians 4:24)

The new man is created after God in righteousness and true holiness. This means that the believer is called to reflect God's character in everyday life. We must not be content with merely appearing religious; our conduct should increasingly reveal honesty, purity, compassion, humility and faithfulness.

Holiness is not confined to the church building. It must be seen in the home, workplace, business, ministry and private life. The renewed mind produces a life that honours God when people are watching and when no human being is present.

d. Walk in the newness of life (Romans 6:4)

Through Christ, believers are called to walk in newness of life. This means that our daily habits should demonstrate that we belong to Jesus. We are not expected to become perfect by our own strength, but we must continue to yield to the Holy Spirit, repent when we fall and pursue spiritual maturity.

Make practical changes that support your new life. If certain friendships continually lead you into sin, establish wise boundaries. If your speech is destructive, practise speaking truthfully and graciously. If your mind is dominated by fear, meditate on God's promises. If you have wronged someone, seek reconciliation where possible. Faith must become visible in action.

Biblical Example: Zacchaeus (Luke 19:1-10)

When Jesus visited Zacchaeus, the encounter produced a visible change in his life. He committed himself to giving to the poor and making restitution to those he had defrauded. His response demonstrated that receiving Christ was more than an emotional experience; it affected his values, conduct and relationship with others. Genuine transformation should produce practical evidence of a renewed life.

6. A RENEWED MIND PRODUCES A DIFFERENT WAY OF LIVING

The purpose of renewing the mind is not merely to increase biblical knowledge. It is to produce a life that pleases God. When our thinking changes, our priorities, relationships, speech, decisions and responses to challenges should also begin to change.

The renewed mind does not mean that a believer will never experience temptation, discouragement or negative thoughts. It means that these things no longer have to rule the believer's life. Through the Word, prayer, obedience and the Holy Spirit's help, we can learn to respond according to God's truth rather than the impulses of the old nature.

a. A renewed mind produces godly speech (Ephesians 4:29)

Paul commands believers to let no corrupt communication proceed from their mouths, but to speak what is good for edification. Our words often reveal what has been occupying our minds. A mind filled with bitterness produces hurtful speech, while a heart being shaped by God's truth learns to speak with grace and wisdom.

Before speaking, ask whether your words are true, necessary, loving and helpful. Avoid gossip, slander, destructive criticism and careless statements that damage others. Use your words to encourage, correct with humility, strengthen faith and bring glory to God.

b. A renewed mind produces forgiveness and kindness (Ephesians 4:31-32)

The old mind holds tightly to resentment and often seeks opportunities for revenge. The renewed mind recognises the mercy received through Christ and learns to extend mercy to others. Forgiveness does not mean pretending that wrongdoing never happened or removing every necessary boundary; it means refusing to let bitterness govern the heart.

God commands us to put away bitterness, wrath, anger, clamour and evil speaking, and to be kind, tender-hearted and forgiving. This instruction is essential in families, churches and ministries. A renewed mind seeks reconciliation where possible and refuses to nurture hatred.

c. A renewed mind produces spiritual discernment (Hebrews 5:14)

Spiritual maturity develops as believers exercise their discernment through practice. We learn to recognise the difference between what is spiritually healthy and what is harmful. This requires familiarity with Scripture and a willingness to obey it.

Do not measure every teaching by its popularity, emotional appeal or the reputation of the person presenting it. Examine teachings in the light of God's Word. Discernment also means recognising when an opportunity, relationship or habit may distract you from your responsibilities and spiritual growth.

d. A renewed mind produces a Christ-centred life (Philippians 2:5)

“Let this mind be in you, which was also in Christ Jesus.” — Philippians 2:5 (KJV)

The ultimate pattern for the Christian mind is Jesus Christ. His life displayed humility, obedience, love, purity and devotion to the Father's will. He did not live to promote selfish ambition but willingly humbled Himself in obedience to God.

To have the mind of Christ is to let His character shape our attitudes and decisions. In the home, we choose love and responsibility. In leadership, we choose service rather than pride. In conflict, we pursue truth with grace. In temptation, we choose holiness. In uncertainty, we trust the Father. The renewed mind continually asks, “What response would honour Christ in this situation?”

Biblical Example: Daniel (Daniel 1:8-20)

Daniel lived in a foreign culture that could have reshaped his values and identity. Yet he purposed in his heart not to defile himself. His decision was supported by discipline, wisdom and faithfulness to God. Daniel's life demonstrates that a person can live in a challenging environment without surrendering godly convictions. A renewed mind enables believers to stand firm in their faith while serving faithfully wherever God places them.

CONCLUSION

The vanity of the old mind is the emptiness of thinking and living without submission to God. It leads people to trust their own understanding above God's wisdom, pursue temporary pleasures above eternal values and resist the truth that could bring transformation. But through Jesus Christ, we are not condemned to remain under the control of our former patterns. God calls us to put off the old man, be renewed in our minds and put on the new man created in righteousness and holiness. The Holy Spirit and the Word of God provide the means by which this transformation takes place as we respond in faith and obedience.

Today, make a deliberate commitment to examine your thoughts and surrender them to Christ. Reject every mindset that encourages pride, bitterness, impurity, unbelief or disobedience. Begin each day with God's Word, practise prayerful reflection, receive correction humbly and take practical steps towards godly living. Do not merely desire a changed life; allow God to renew the mind from which your choices proceed. As you continue in Christ, may your thinking become more aligned with His truth and your life increasingly reflect His character.

PRAYER POINTS

1. Father, in the name of Jesus, deliver me from every pattern of empty, worldly and unprofitable thinking, and teach me to submit my mind to Your truth in Jesus name.

2. O Lord, expose every wrong attitude, hidden motive and deceptive imagination in my heart, and give me the grace to repent and change in Jesus name.

3. Father, renew my mind through Your Word and the power of the Holy Spirit, so that my thoughts, decisions and desires will honour You in Jesus name.

4. Every stronghold of fear, pride, bitterness, lust, unbelief and disobedience operating in my thinking, be broken by the power of God in Jesus name.

5. Lord, deliver me from the pressure to conform to ungodly standards, and empower me to stand firmly for righteousness in Jesus name.

6. Father, give me a teachable heart that welcomes Your correction and obeys Your instructions without delay in Jesus name.

7. O Lord, help me to cast down every imagination that contradicts Your Word and bring every thought into the obedience of Christ in Jesus name.

8. Father, purify my speech, attitudes and relationships, and let the fruit of a renewed mind be evident in my daily conduct in Jesus name.

9. Lord, grant me spiritual discernment to recognise deception, resist temptation and choose what is pleasing in Your sight in Jesus name.

10. Father, let the mind of Christ be formed in me, and make my life a testimony of genuine transformation, holiness and obedience in Jesus name.

PROPHETIC DECLARATIONS

1. You are delivered from the vanity of the old mind; your thoughts are being brought under the authority of Jesus Christ, and your life will increasingly reflect the truth of God's Word in the mighty name of Jesus.

2. You will not be controlled by the patterns of this world; you will stand firm in righteousness, discern God's will and make decisions that honour Him in the mighty name of Jesus.

3. Every destructive thought pattern that has hindered your spiritual growth is being confronted by the truth of God's Word, and you will walk in increasing freedom and maturity in the mighty name of Jesus.

4. Your understanding will be enlightened by the Holy Spirit, and you will receive wisdom to distinguish truth from deception, good from evil and God's direction from human impulse in the mighty name of Jesus.

5. You will no longer be a prisoner of your past mistakes or former sinful habits; through Christ, you will walk in newness of life and demonstrate the transforming power of God's grace in the mighty name of Jesus.

6. Your mind will be filled with what is true, pure, lovely and worthy of praise, and your thoughts will produce godly words, wise decisions and fruitful actions in the mighty name of Jesus.

7. You will receive grace to forgive those who have hurt you, overcome bitterness and cultivate relationships that reflect the love and character of Christ in the mighty name of Jesus.

8. You will not be deceived by temporary pleasures or distracted from your eternal purpose; your heart will remain focused on Christ and your life will bear lasting spiritual fruit in the mighty name of Jesus.

9. You will grow in spiritual discernment, discipline and obedience; you will recognise ungodly influences and receive courage to reject whatever draws you away from God's will in the mighty name of Jesus.

10. The mind of Christ will increasingly govern your attitudes, choices and conduct; you will walk in holiness, humility and wisdom, and your life will bring glory to God in the mighty name of Jesus.