Ephesians 4 is the fourth chapter of the Epistle to the Ephesians in the New Testament of the Christian Bible. Traditionally, it is believed to have been written by Apostle Paul while he was in prison in Rome (around AD 62), but more recently, it has been suggested that it was written between AD 80 and 100 by another writer using Paul's name and style. This chapter is a part of Paul's exhortation (Ephesians 4–6), with the particular section about the mutual interdependence of the Christians as the church (verses 1–16) and how they should live in the world (4:17–5:20).