"Being diligent to preserve the unity of the Spirit in the bond of peace."
Ephesians 4:3

The Greek word for unity is 'henotes' meaning 'oneness, I.e.
unanimity:--unity' as defined in "Strong's Exhaustive Concordance of the
Bible".

"Thorndike & Barnhart" define unanimity as 'complete accord or agreement.'

For those who have been born again of the Spirit, who have been brought
out of spiritual death and made alive in Christ, unity is sure. Man can not
bring this about it is only by and through the work of the Holy Spirit.

Ephesians 4:4-6 says,
"There is one body and one Spirit, just as also you were called in one hope
of your calling; one Lord, one faith, one baptism, one God and Father of all
who is over all and through all and in all."

The Holy Spirit has been sent by the Father as Jesus promised to lead the
children of God into all truth.
"And I will ask the Father, and He will give you another Help, that He may
be with you forever, that is the Spirit of truth..." John 14:16
"But the Helper, the Holy Spirit, whom the Father will send in My name, He
will teach you all things, and bring to your remembrance all that I said to
you." John 14:26
"For all who are being led by the Spirit of God, these are the sons of God."
Romans 8:14

Before our new birth we were far from God; aliens, separated from Christ.
Ephesians 2 tells us,
"Therefore remember, that formerly you, the Gentiles in the flesh...were at
that time separate from Christ, excluded from the commonwealth of Israel,
and strangers to the covenant of promise, having no hope and without God
in  the world. Vs. 11-12
"But now in Christ Jesus you who formerly were far off have been brought
near by the blood of Christ. Vs.13
"For He Himself is our peace, who made both groups into one, and broke
down  the barrier of the dividing wall, by abolishing in His flesh the
enmity...that in Himself He might make the two into one new man...and might
reconcile them both in one body to God through the cross..." Vs. 14-16

Because of this we are no long strangers; we have access to the Father in
the Spirit.
"For through Him (Christ) we both have our access in one Spirit to the
Father. Vs. 18
So then you are no longer strangers and aliens, but you are fellow citizens
with the saints, and are of God's household." Vs.19

In the Spirit we are being built into a dwelling place of God.
"...built on the foundation of the apostles and prophets, Christ Jesus
Himself being the corner stone, in whom the whole building, being fitted
together is growing into a holy temple in the Lord; in whom you also are
being built together into a dwelling of God in the Spirit." Vs.20-22

Read all of Ephesians 2:11-22 to see how the oneness of the Father, Son
and Holy Spirit is at work bringing the called ones into that
oneness --unity--in one new man.

Finally, look again at Ephesians 4:11-16,
Vs. 11 "It was He who gave some to be apostles, some to be prophets, some
to be evangelists, and some to be pastors and teachers,
Vs. 12 "to prepare God's people for works of service, so that the body of
Christ may be build up
Vs. 13 "until we all reach unity in the faith and in the knowledge of the
Son of God and become mature, attaining to the whole measure of the fullness
of Christ.
Vs. 14 "Then we will no longer be infants tossed back and forth by waves,
and blown here and there by every wind of teaching and by the cunning and
craftiness of men in their deceitful scheming.
Vs. 15 "Instead, speaking the truth in love, we will in all things grow up
into Him who is the Head, that is, Christ.
Vs. 16 "From Him the whole body is joined and held together...grows and
builds itself up in love, as each part does its work."

One with God in Christ! How gracious is He and how humble are we! Praise Him
forever! Amen