The message of Ephesians 4 is that God calls church leaders to equip the people in their churches for works of service that will unify the body in their faith and knowledge of Jesus Christ. The author calls on church members to invest in one another.
The author divides Ephesians 4 into two main sections. First, Ephesians 4:1-16 focuses primarily on the responsibility of church leaders to guide their congregations into a corporate life of unity, love and humility. The role of church leaders is crucial to the growth of the church body. The Bible regularly describes conversion to Christianity as a new birth. Therefore, all who trust Jesus Christ for salvation, regardless of their age, paradoxically become infants. God provides the church leaders to care for the church as parents care for their children and guide them into mature adult lives.
The second half of the chapter, Ephesians 4:17-32, identifies the responsibilities of church members to care for one another, speak truthfully to one another, and to genuinely forgive one another. The author of Ephesians reminds his audience to disregard their former lives before their new births into Christianity. They must lay aside the old ways in which they harbored anger toward those who wronged them and slandered them with hurtful words. Now that they are Christians, they must seek to love others and speak truthfully in order to model the love of Jesus.