Unity

Psa 133:1 A Song of degrees of David. Behold, how good and how pleasant it is for brethren to dwell together in unity! 

Psa 133:2 It is like the precious ointment upon the head, that ran down upon the beard, even Aaron's beard: that went down to the skirts of his garments;
Psa 133:3 As the dew of Hermon, and as the dew that descended upon the mountains of Zion: for there the LORD commanded the blessing, even life for evermore.

Unity in Christ Jesus is for fellowship in the Spirit of God. Fellowship without the spirit is just a membership club.

Eph 4:3 Endeavouring to keep the unity of the Spirit in the bond of peace.

Keeping unity requires likeminded people. People who believe the truth of God. There is a God given structure given to the church for unity.

Eph 4:11 And he gave some, apostles; and some, prophets; and some, evangelists; and some, pastors and teachers;
Eph 4:12 For the perfecting of the saints, for the work of the ministry, for the edifying of the body of Christ:
Eph 4:13 Till we all come in the unity of the faith, and of the knowledge of the Son of God, unto a perfect man, unto the measure of the stature of the fulness of Christ:
Eph 4:14 That we henceforth be no more children, tossed to and fro, and carried about with every wind of doctrine, by the sleight of men, and cunning craftiness, whereby they lie in wait to deceive;
Eph 4:15 But speaking the truth in love, may grow up into him in all things, which is the head, even Christ:
Eph 4:16 From whom the whole body fitly joined together and compacted by that which every joint supplieth, according to the effectual working in the measure of every part, maketh increase of the body unto the edifying of itself in love.

One good reason for unity is to keep the babes in Christ from falling into false doctrine. We are to be built up in faith through the five fold ministries and by exercising our gifts in the spirit of love and peace. Debate and strife have no place in the true people of God. We should give answers to why we believe and leave the convicting to the Holy Spirit. It takes discernment to know when someone is asking questions for understanding or to start a debate. Having seen so much manipulation and deceit, it takes the Holy Spirit to help us, not our own quick response to shut them up.

Rom 15:4 For whatsoever things were written aforetime were written for our learning, that we through patience and comfort of the scriptures might have hope.
Rom 15:5 Now the God of patience and consolation grant you to be likeminded one toward another according to Christ Jesus:
Rom 15:6 That ye may with one mind and one mouth glorify God, even the Father of our Lord Jesus Christ.

We must learn to walk in the Spirit having patience, a fruit of the Spirit. The Holy Spirit moves with the word of God. They go together, never apart. Do you want more Spiritual living? then you need more of the word of God with the fruit of the Spirit. (Read Gal 5:22-23) Love is the motivation for all the fruit.

Php 2:2 Fulfil ye my joy, that ye be likeminded, having the same love, being of one accord, of one mind.
Php 2:3 Let nothing be done through strife or vainglory; but in lowliness of mind let each esteem other better than themselves.

Php 2:19 But I trust in the Lord Jesus to send Timotheus shortly unto you, that I also may be of good comfort, when I know your state.
Php 2:20 For I have no man likeminded, who will naturally care for your state.
Php 2:21 For all seek their own, not the things which are Jesus Christ's.
Php 2:22 But ye know the proof of him, that, as a son with the father, he hath served with me in the gospel.

Timothy was a close disciple through Paul's teaching, likeminded to Paul in service.

2Ti 2:1 Thou therefore, my son, be strong in the grace that is in Christ Jesus.
2Ti 2:2 And the things that thou hast heard of me among many witnesses, the same commit thou to faithful men, who shall be able to teach others also.
2Ti 2:3 Thou therefore endure hardness, as a good soldier of Jesus Christ.
2Ti 2:4 No man that warreth entangleth himself with the affairs of this life; that he may please him who hath chosen him to be a soldier.
2Ti 2:5 And if a man also strive for masteries, yet is he not crowned, except he strive lawfully.

This is important. If the truth is to continue it must be shared and learned through making disciples. So unity requires learning and understanding God's word; especially the work of grace through faith in the Lord Jesus Christ. You were called for a purpose and when you were called you responded in faith. Abraham responded to the call of the LORD by faith, Isaiah responded by faith. All who are called must respond to the calling and learn. This calling is from the LORD, not of the world. We are not to get entangled in the world's cares and confusion.

2Co 13:11 Finally, brethren, farewell. Be perfect, be of good comfort, be of one mind, live in peace; and the God of love and peace shall be with you.

1Jn 4:15 Whosoever shall confess that Jesus is the Son of God, God dwelleth in him, and he in God. 

1Jn 4:16 And we have known and believed the love that God hath to us. God is love; and he that dwelleth in love dwelleth in God, and God in him.
1Jn 4:17 Herein is our love made perfect, that we may have boldness in the day of judgment: because as he is, so are we in this world.
1Jn 4:18 There is no fear in love; but perfect love casteth out fear: because fear hath torment. He that feareth is not made perfect in love.
1Jn 4:19 We love him, because he first loved us.

I love the peace of God that comes by faith and obedience. This is not as the world's peace. Peace with the devil is not eternal peace. God's peace and love are for those who have been translated into his kingdom.

Col 1:12 Giving thanks unto the Father, which hath made us meet to be partakers of the inheritance of the saints in light:
Col 1:13 Who hath delivered us from the power of darkness, and hath translated us into the kingdom of his dear Son:
Col 1:14 In whom we have redemption through his blood, even the forgiveness of sins:
Col 1:15 Who is the image of the invisible God, the firstborn of every creature:
Col 1:16 For by him were all things created, that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by him, and for him:
Col 1:17 And he is before all things, and by him all things consist.
Col 1:18 And he is the head of the body, the church: who is the beginning, the firstborn from the dead; that in all things he might have the preeminence.
Col 1:19 For it pleased the Father that in him should all fulness dwell;
Col 1:20 And, having made peace through the blood of his cross, by him to reconcile all things unto himself; by him, I say, whether they be things in earth, or things in heaven.
Col 1:21 And you, that were sometime alienated and enemies in your mind by wicked works, yet now hath he reconciled
Col 1:22 In the body of his flesh through death, to present you holy and unblameable and unreproveable in his sight:
Col 1:23 If ye continue in the faith grounded and settled, and be not moved away from the hope of the gospel, which ye have heard, and which was preached to every creature which is under heaven; whereof I Paul am made a minister;

You must stay the course, to win the race. God knows who are his own. One way we can know those of faith is by peaceful unity with like minded believers in the word of God. The Spirit knows the word of God and those who are of like minds have the same spirit.