Paul, a prisoner for the Lord, urges believers to walk in a manner worthy of the calling to which they have been called: with all humility and gentleness, bearing with one another in love and eager to maintain the unity of the Spirit in the bond of peace. There is one body and one Spirit, one hope, one Lord, one faith, one baptism, one God and Father of all.
Grace was given to each according to the measure of Christ's gift, and he ascended and gave gifts to his people. He gave some to be apostles, some prophets, some evangelists and some shepherds and teachers, to equip the saints for the work of ministry and for building up the body of Christ, until we all attain to the unity of the faith and the knowledge of the Son of God, to maturity, to the measure of the stature of the fullness of Christ. Then they will no longer be children, tossed by every wind of doctrine, but, speaking the truth in love, will grow up in every way into him who is the head, Christ, from whom the whole body grows.
Then Paul asks them not to walk as the Gentiles do, in the futility of their minds, darkened in understanding and hardened in heart. That is not the way they learned Christ: they are to put off the old self, be renewed in the spirit of their minds and put on the new self, created after the likeness of God in true righteousness and holiness.
Concrete commands follow: put away falsehood and speak the truth, be angry and do not sin and do not let the sun go down on anger, give no opportunity to the devil, steal no more but work to have something to share with the needy, let no corrupting talk come out but only what builds up, and do not grieve the Holy Spirit, with whom they were sealed. Put away all bitterness, anger and slander; be kind and tenderhearted, forgiving one another as God in Christ forgave them.