Christ became Mediator in order that the ones called “might receive the promise of the everlasting inheritance” (Heb 9:15); he assists, not the angels, but “Abraham’s seed.” (Heb 2:16) He assists those who are to be brought into the new covenant to be ‘adopted’ into Jehovah’s household of sons; these eventually will be in heaven as Christ’s brothers, becoming a part with him of the seed of Abraham. (Ro 8:15-17, 23-25; Ga 3:29) He has transmitted to them the promised holy spirit, with which spirit they are sealed and are given a token of what is to come, their heavenly inheritance. (2Co 5:5; Eph 1:13, 14) The total number of those who are finally and permanently sealed is revealed in Revelation 7:4-8 as 144,000.

Blessings to Mankind in General. While Jesus’ mediatorship operates solely toward those in the new covenant, he is also God’s High Priest and the Seed of Abraham. In fulfilling his duties in these latter two positions, he will bring blessings to others of mankind, for all the nations are to be blessed by means of Abraham’s seed. Those in the new covenant are first blessed by Christ, the primary Seed (Ga 3:16, 29), being brought in as associate members of the seed. Being made kings and priests by reason of the new covenant that he mediated, they will share in administering the blessings of Jesus’ sacrifice and of his Kingdom rule to all the nations of the earth. Christ’s mediatorship, having accomplished its purpose by bringing “the Israel of God” into this position, thus results in benefits and blessings to all mankind.​—Ga 6:16; Ge 22:17, 18.