Ephesians is divided into two parts: The first (chapters 1 – 3) lays the theological foundation for the second (chapters 4 – 6). The first is the basis for the very practical directions in the second.
At the end of chapter three, Paul prays for these Christians, that out of God’s “glorious riches he may strengthen you with power through his Spirit in your inner being, so that Christ may dwell in your hearts through faith. And I pray that you, being rooted and established in love, may have power, together with all the saints, to grasp how wide and long and high and deep is the love of Christ, and to know this love that surpasses knowledge—that you may be filled to the measure of all the fullness of God” (3:16-19).
If God answered that prayer, what would a person’s life look like?
It wouldn’t look like the life being lived by the Ephesians Christians at the time.
And so, beginning in chapter four, Paul tells them how their lives must change.
Verse thirteen of chapter 4 is vitally important. We are to “attain to the whole measure of the fullness of Christ.” Jesus is the fullness of God (1:23). When you see Jesus, you see God. We are to be the fullness of Christ. When you look at the Church, you are supposed to see Jesus. If this goal alone were our sole goal, one to which we devoted our whole being, it would be enough.