The disciples were to go forth as Christ’s witnesses, to declare to the world what they had seen and heard of Him. Their office was the most important to which human beings had ever been called, second only to that of Christ Himself. They were to be workers together with God for the saving of men. As in the Old Testament the twelve patriarchs stood as representatives of Israel, so the twelve apostles stand as representatives of the gospel church. (AA 19.1) MC VC

During His earthly ministry Christ began to break down the partition wall between Jew and Gentile, and to preach salvation to all mankind. Though He was a Jew, He mingled freely with the Samaritans, setting at nought the Pharisaic customs of the Jews with regard to this despised people. He slept under their roofs, ate at their tables, and taught in their streets. (AA 19.2) MC VC

The Saviour longed to unfold to His disciples the truth regarding the breaking down of the “middle wall of partition” between Israel and the other nations—the truth that “the Gentiles should be fellow heirs” with the Jews and “partakers of His promise in Christ by the gospel.” Ephesians 2:14; 3:6. This truth was revealed in part at the time when He rewarded the faith of the centurion at Capernaum, and also when He preached the gospel to the inhabitants of Sychar. Still more plainly was it revealed on the occasion of His visit to Phoenicia, when He healed the daughter of the Canaanite woman. These experiences helped the disciples to understand that among those whom many regarded as unworthy of salvation, there were souls hungering for the light of truth. (AA 19.3) MC VC

Thus Christ sought to teach the disciples the truth that in God’s kingdom there are no territorial lines, no caste, no aristocracy; that they must go to all nations, bearing to them the message of a Saviour’s love. But not until later did they realize in all its fullness that God “hath made of one blood all nations of men for to dwell on all the face of the earth, and hath determined the times before appointed, and the bounds of their habitation; that they should seek the Lord, if haply they might feel after Him, and find Him, though He be not far from every one of us.” Acts 17:26, 27. (AA 20.1) MC VC

In these first disciples was presented marked diversity. They were to be the world’s teachers, and they represented widely varied types of character. In order successfully to carry forward the work to which they had been called, these men, differing in natural characteristics and in habits of life, needed to come into unity of feeling, thought, and action. This unity it was Christ’s object to secure. To this end He sought to bring them into unity with Himself. The burden of His labor for them is expressed in His prayer to His Father, “That they all may be one; as Thou, Father, art in Me, and I in Thee, that they also may be one in Us;” “that the world may know that Thou has sent Me, and hast loved them, as Thou hast loved Me.” John 17:21, 23. His constant prayer for them was that they might be sanctified through the truth; and He prayed with assurance, knowing that an Almighty decree had been given before the world was made. He knew that the gospel of the kingdom would be preached to all nations for a witness; He knew that truth armed with the omnipotence of the Holy Spirit, would conquer in the battle with evil, and that the bloodstained banner would one day wave triumphantly over His followers. (AA 20.2) MC VC