“Wherefore, holy brethren, partakers of the heavenly calling, consider the Apostle and High Priest of our profession, Christ Jesus; Who was faithful to him that appointed him” (Heb 3:1-2). This “heavenly calling” in Hebrews refers to the Son of God calling to Abraham out of heaven, “And the angel [messenger] of the LORD called unto him out of heaven … And the angel [messenger] of the LORD called unto Abraham out of heaven the second time” (Gen 22:11,15). The Greek apostolos rendered as “Apostle” simply means “one sent.” In context, God’s Son is the Lamb sent that Abraham foretold, “And Abraham said, My son, God will provide himself a lamb for a burnt offering” (Gen 22:8). And that He “was faithful to him” is that the Son was faithful to His Father in sacrificing Himself for us.
Paul taught in Romans the faithfulness of Christ, “the righteousness of God through the faithfulness of Jesus Christ … the justifier of the one who lives because of Jesus’ faithfulness” (Rom 3:22,26 NET). Through faithfulness in shedding His blood, He became the true mercy seat for the remission of sins, “Whom God hath set forth to be a propitiation [mercy seat] through faith [faithfulness] in his blood, to declare his righteousness for the remission of sins that are past, through the forbearance of God” (v. 25). Therefore, when Paul concluded “that a man is justified by faith [faithfulness] without the deeds [actions] of the law” (v. 28), he meant that our sins are remitted by Christ’s faithfulness to shed His blood, not by the actions the law required—the high priest sprinkling blood of animals on the mercy seat.
When Paul said “For by grace are ye saved through faith [faithfulness]; and that not of yourselves: it is the gift of God: Not of works [actions]” (Eph 2:8-9), he wasn’t speaking of our faith but Christ’s faithfulness, “in whom we have boldness and confident access to God because of Christ’s faithfulness” (Eph 3:12 NET). The grace by which we’re saved is through Christ’s faithfulness to shed His blood, “In whom we have redemption through his blood, the forgiveness of sins, according to the riches of his grace” (Eph 1:7). The actions of the law were abolished when the partitioning wall of the temple was tore, “the veil of the temple was rent” (Mat 27:51; Mar 15:38; Luk 23:45), “hath broken down the middle wall of partition between us; Having abolished in his flesh the enmity, even the law of commandments contained in ordinances” (Eph 2:14-15), “boldness to enter into the holiest by the blood of Jesus, By a new and living way, which he hath consecrated for us, through the veil, that is to say, his flesh” (Heb 10:19-20).
Christ spoke of His faithfulness to do the will of His Father sending Him: “For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life” (Jhn 3:16); “My meat is to do the will of him that sent me, and to finish his work” (Jhn 4:34); “I seek not mine own will, but the will of the Father which hath sent me” (Jhn 5:30); “For I came down from heaven, not to do mine own will, but the will of him that sent me” (Jhn 6:38); “I lay down my life, that I might take it again. No man taketh it from me, but I lay it down of myself” (Jhn 10:17-18); “O my Father, if it be possible, let this cup pass from me: nevertheless not as I will, but as thou wilt” (Mat 26:39), “not what I will, but what thou wilt” (Mar 14:36), “not my will, but thine, be done” (Luk 22:42).
Paul contrasted the actions prescribed by the law with Christ’s faithfulness to give Himself for our sins, “no one is justified by the works [actions] of the law but by the faithfulness of Jesus Christ. And we have come to believe in Christ Jesus, so that we may be justified by the faithfulness of Christ and not by the works [actions] of the law, because by the works [actions] of the law no one will be justified” (Gal 2:16 NET), “I have been crucified with Christ, and it is no longer I who live, but Christ lives in me. So the life I now live in the body, I live because of the faithfulness of the Son of God, who loved me and gave himself for me” (v. 20 NET). Habakkuk’s famous statement “the person of integrity will live because of his faithfulness” (2:4 NET), “the righteous person will live by his faithfulness” (2:4 NIV), isn’t about our faith but Christ’s faithfulness. Therefore, “But that no man is justified by the law in the sight of God, it is evident: for, The just shall live by faith [faithfulness] … That the blessing of Abraham might come on the Gentiles through Jesus Christ; that we might receive the promise of the Spirit through faith [faithfulness]” (Gal 3:11,14), is that the blessing of Abraham comes to us, not by the sacrificial actions of the law, but by the faithfulness of Christ’s own sacrifice. Thus, the blessing of Abraham, “And the angel [messenger] of the LORD called unto Abraham out of heaven … That in blessing I will bless thee, and in multiplying I will multiply thy seed as the stars of the heaven, and as the sand which is upon the sea shore; and thy seed shall possess the gate of his enemies” (Gen 22:15,17), is by the faithfulness of his Seed, “Now to Abraham and his seed were the promises made. He saith not, And to seeds, as of many; but as of one, And to thy seed, which is Christ” (Gal 3:16).