Paul calls believers to live a transformed life that reflects their new identity in Christ. He starts by urging the Ephesians to "no longer live as the Gentiles do, in the futility of their thinking" (Ephesians 4:17). This command highlights the stark contrast between the old way of life, characterized by ignorance, hard-heartedness, and moral corruption, and the new way of life that believers are called to embrace. Paul emphasizes that the old self, which is "being corrupted by its deceitful desires," must be put off (Ephesians 4:22).

Paul's use of the metaphor of changing clothes is particularly powerful. He instructs believers to "put on the new self, created to be like God in true righteousness and holiness" (Ephesians 4:24). This imagery conveys the idea of shedding old, sinful behaviors and adopting a new way of living that reflects God's character. It is a call to active participation in the process of sanctification, where believers continually strive to align their lives with the example of Christ.

Central to this transformation is the renewal of the mind. Paul writes, "to be made new in the attitude of your minds" (Ephesians 4:23). This renewal is not a superficial change but a deep inner change that affects one's entire outlook and behavior. It involves replacing old, worldly thoughts and attitudes with those that are shaped by the truth of God's Word. This renewed mindset enables believers to discern God's will and live in a way that pleases Him.

Paul's invitation illustrates the importance of living out one's faith in practical ways. The new life in Christ is not just about inward change but is manifested in outward actions. Believers are called to embody the values of righteousness and holiness in their daily lives. This includes being truthful, practicing kindness, and maintaining purity in thought and deed.