Verses 14, 15. - Out of those who thus came to him, he ordained twelve literally, he made or appointed twelve. They were not solemnly ordained or consecrated to their office until after his resurrection. Their actual consecration (of all of them at least but one, namely, Judas Iscariot) took place when he breathed on them and said, "Receive ye the Holy Ghost" (John 20:22). But from this time they were his apostles "designate." They were henceforth to Be with him as his attendants and disciples. They were to go forth and preach under his direction, and by his power they were to cast out devils. Several manuscripts add here that they were "to heal sicknesses," but the words are emitted in some of the oldest authorities. The authority over unclean spirits is more formally conveyed later on (see Mark 6:7), so that here St. Mark speaks by anticipation. But this shows how much importance was attached to this part of their mission; for it recognizes the spiritual world, and the special purpose of the manifestation of the Son of God, namely, that he might "destroy the works of the devil." He appointed twelve. The number twelve symbolizes perfection and universality. The number three indicates what is Divine; and the number four, created things. Three multiplied by four gives twelve, the number of those who were to go forth as apostles into the four quarters of the world - called to the faith of the holy Trinity.

3:13-21 Christ calls whom he will; for his grace is his own. He had called the apostles to separate themselves from the crowd, and they came unto him. He now gave them power to heal sicknesses, and to cast out devils. May the Lord send forth more and more of those who have been with him, and have learned of him to preach his gospel, to be instruments in his blessed work. Those whose hearts are enlarged in the work of God, can easily bear with what is inconvenient to themselves, and will rather lose a meal than an opportunity of doing good. Those who go on with zeal in the work of God, must expect hinderances, both from the hatred of enemies, and mistaken affections of friends, and need to guard against both.And he ordained twelve,.... Or made, constituted, and appointed twelve men, out of those he called to him. The Arabic version adds, "and called them apostles"; which seems to be taken out of Luke 6:13.

That they should be with him; constantly, in private and in public; be taken into his family, and reckoned such; be his familiars, and privy to all his affairs; hear all his discourses, and see his miracles; that so they might be trained up and fitted for the great work he designed them for:

and that he might send them forth to preach; the Gospel in Judea first, and then in all the world: for he did not at this time send them to preach, only chose; called, and appointed them; and after they had been with him some time, and were better qualified for such service, he sent them forth, as in Matthew 10:1, for this constitution of them was before that mission, and was in order to it.