John 17:11 – “And now I am no more in the world, but these are in the world, and I come to thee. Holy Father, keep through thine own name those whom thou hast given me, that they may be one, as we are.”

Genesis 1:26-27 – And God said, Let us make man in our image, after our likeness: and let them have dominion over the fish of the sea, and over the fowl of the air, and over the cattle, and over all the earth, and over every creeping thing that creepeth upon the earth. So God created man in his own image, in the image of God created he him; male and female created he them.
 

Satan well knows that success can only attend order and harmonious action. He well knows that everything connected with heaven is in perfect order, that subjection and perfect discipline mark the movements of the angelic host. It is his studied effort to lead professed Christians just as far from heaven's arrangement as he can; therefore he deceives even the professed people of God and makes them believe that order and discipline are enemies to spirituality, that the only safety for them is to let each pursue his own course, and to remain especially distinct from bodies of Christians who are united and are laboring to establish discipline and harmony of action. All the efforts made to establish order are considered dangerous, a restriction of rightful liberty, and hence are feared as popery. These devoted souls consider it a virtue to boast of their freedom to think and act independently. They will not take any man's say-so. They are amenable to no man. I was shown that it is Satan's special work to lead men to feel that it is God's order for them to strike out for themselves and choose their own course independent of their brethren. (Testimonies to Ministers – 29) 

It is not a great number of institutions, large buildings, and outward display that God requires, but the harmonious action of a peculiar people, a people chosen by God and precious, united with one another, their life hid with Christ in God. Every man is to stand in his lot and place, exerting a right influence in thought, word, and deed. When all God's workers do this, and not till then, His work will be a complete, symmetrical whole. (8 Testimonies – 183) 

The methods and plans by which the work is to be done must be after the Lord's order, not after your individual ideas, and the results will more than compensate for the outlay. Missionary effort will become more general, and the example of one zealous worker, working in the right direction, will influence others, and they also will go forth to preach the gospel. The missionary spirit will pass from house to house, and the brethren will find something to talk about of more interest than their grievances. They will be interested in displaying the jewels of truth which the Bible contains, and churches will be established, meetinghouses erected, and many will come to the help of the Lord. The brethren will be united in bonds of love, and will realize their unity with experienced Christians in all parts of the world, as they are one in their plans, one in the object of their interest. An advance step taken by those at the head of the work will be felt by those in this country and in all lands, and those in foreign countries will respond to the effort made at the center of the work in following our great Leader; and so, through the conversion of souls to the truth, a volume of praise will rise to Him who sitteth upon the throne. (Fundamentals of Church Education – 208) 

It should be understood that perfect unity among the laborers is necessary to the successful accomplishment of the work of God. In order to preserve peace, all must seek wisdom from the Great Teacher. Let all be careful how they introduce ambitious propositions that will create dissension. 

We are to be subject one to another. No man, in himself, is a complete whole. Through submission of the mind and will to the Holy Spirit we are ever to be learners of the Great Teacher. 

Study the second chapter of Acts. In the early church the Spirit of God wrought mightily through those who were harmoniously united. On the Day of Pentecost they were all with one accord in one place. (9 Testimonies -196) 
 

Unity existing among the followers of Christ is an evidence that the Father has sent His Son to save sinners. It is a witness to His power; for nothing short of the miraculous power of God can bring human beings with their different temperaments together in harmonious action, their one aim being to speak the truth in love. (9 Testimonies -194) 

Our Saviour follows His lessons of instruction with a promise that if two or three should be united in asking anything of God it should be given them. Christ here shows that there must be union with others, even in our desires for a given object. Great importance is attached to the united prayer, the union of purpose. God hears the prayers of individuals, but on this occasion Jesus was giving especial and important lessons that were to have a special bearing upon His newly organized church on the earth. There must be an agreement in the things which they desire and for which they pray. It was not merely the thoughts and exercises of one mind, liable to deception; but the petition was to be the earnest desire of several minds centered on the same point. (3 Testimonies - 429) 

The Lord desires His chosen servants to learn how to unite together in harmonious effort. It may seem to some that the contrast between their gifts and the gifts of a fellow laborer is too great to allow them to unite in harmonious effort; but when they remember that there are varied minds to be reached, and that some will reject the truth as it is presented by one laborer, only to open their hearts to God's truth as it is presented in a different manner by another laborer, they will hopefully endeavor to labor together in unity. Their talents, however diverse, may all be under the control of the same Spirit. In every word and act, kindness and love will be revealed; and as each worker fills his appointed place faithfully, the prayer of Christ for the unity of His followers will be answered, and the world will know that these are His disciples. (9 Testimonies - 145) 

1 Corinthians 3:9 – For we are labourers together with God… 

Psalms 133:1-2 – Behold, how good and how pleasant it is for brethren to dwell together in unity! 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. 

Acts 2:1-4 – And when the day of Pentecost was fully come, they were all with one accord in one place. And suddenly there came a sound from heaven as of a rushing mighty wind, and it filled all the house where they were sitting. And there appeared unto them cloven tongues like as of fire, and it sat upon each of them. And they were all filled with the Holy Ghost, and began to speak with other tongues, as the Spirit gave them utterance.