I love the letter to the Ephesians.  In my time with the Lord today it blessed me so much, again!  Please read it before the Lord and ask the Holy Spirit to open it up to you and let His everlasting love (agape) wash over you and fill you with His joy.
 
Paul is writing to the Ephesians from prison to make them (us, too) more aware of their position in Christ and the Believer’s responsibility to walk in accordance with our heavenly calling. 
 
The first three chapters tell of what is ours ‘in Christ’! (That phrase appears many times in this letter.)
 
Chapter 1:3-6 we are chosen by the Father to be His children:
“Blessed be the God and Father our Lord Jesus Christ, who has blessed us with every spiritual blessing in the heavenly places in Christ,
just as He chose us in Him before the foundation of the world, that we should be holy and without blame before Him in love,
having predestined us to adoption as sons by Jesus Christ to Himself, according to the good pleasure of His will,
to the praise of the glory of His grace by which He as made us accepted in the Beloved.”
 
Verses 7-12 redeemed by the Son
“In Him we have redemption through His blood, the forgiveness of sins, according to the riches of His grace
which He made to abound toward us in all wisdom and prudence,
having made known to us the mystery of His will, according to His good pleasure which He purposed in Himself,
that in the dispensation of the fullness of the times He might gather together in one all things in Christ, both which are in heaven and which are on earth--in Him,
in whom also we have obtained an inheritance, being predestined according to the purpose of Him who works all things according to the counsel of His will, that we who first trusted in Christ should be to the praise of His glory.
 
Verses 13-14 sealed by the Holy Spirit:
In Him you also trusted, after you heard the word of truth, the gospel of your salvation; in whom also, having believed, you were sealed with the Holy Spirit of promise,
who is the guarantee of our inheritance until the redemption of the purchased possession, to the praise of His glory.”
 
Chapter 2:4-10 the new condition: alive to God:
“But God, who is rich in mercy, because of His great love with which He loved us, even when we were dead in trespasses, made us alive together with Christ (by grace you have been saved), and raised us up together, and made us sit together in the heavenly places in Christ Jesus, that in the ages to come He might show the exceeding riches of His grace in His kindness toward us in Christ Jesus.  For by grace you have been saved through faith, and that not of yourselves; it is the gift of God, not of works, least anyone should boast.  For we are His workmanship, created in Christ Jesus for good works, which God prepared beforehand that we should walk in them.”
 
With God’s grace upon grace we have in Chapter 4 the call to unity.
Verses 1-3 is an exhortation to unity:
“I, therefore, the prisoner of the Lord, beseech (exhort) you to have a walk worthy of the calling with which you were called, 
with all lowliness and gentleness, with longsuffering, bearing with one another in love, endeavoring to keep the unity of the Spirit in the bond of peace.” 
 
Verses 4-6 is the explanation of unity:
“There is one body and one Spirit, just as you were called in one hope of your calling; 
one Lord, one faith, one baptism; 
one God and Father of all who is above all, and through all, and in all.”
 
Verses 7-11 gives us the means for unity--gifts:
“But to each one of us grace was given according to the measure of Christ’s gift.
Therefore He says:
    ‘When He ascended on high,
     He led captivity captive,
     And gave gifts to men’  (See Psalm 68:18)
(Now this, ‘He ascended--what does it mean but that He also first descended into the lower parts of the earth?  He who descended is also the One who ascended far above all the heavens, that He might fill all things).  
And He Himself gave some to be apostles, some prophets, some evangelists, and some pastors and teachers.”
 
Verses 12-16 tells us the purpose of the gifts:
“For the equipping of the saints for the work of ministry, for the edifying of the body of Christ,
till we all come to the unity of the faith and the knowledge of the Son of God, to a perfect man, to the measure of the stature of the fullness of Christ;
that we should no longer be children, tossed to and fro and carried about with every wind of doctrine, by the trickery of men, in the cunning craftiness by which they lie in wait to deceive,
but, speaking the truth in love, may grow up in all things into Him who is the head--Christ--
from whom the whole body, joined and knit together by what every joint supplies, according to the effective working by which every part does its share, causes growth of the body for the edifying of itself in love.”
 
This is the unity that we are called to!  It is bound together in Christ. 
And we have Jesus’ commandment in John 15:12,
“This is My commandment, that you love one another as I have loved you.”
So be it.  Amen