Q. 34. How was the covenant of grace administered under the Old Testament?
A. The covenant of grace was administered under the Old Testament, by promises,[126] prophecies,[127] sacrifices,[128] circumcision,[129] the passover,[130] and other types and ordinances, which did all fore-signify Christ then to come, and were for that time sufficient to build up the elect in faith in the promised Messiah,[131] by whom they then had full remission of sin, and eternal salvation.[132]
Q. 35. How is the covenant of grace administered under the New Testament?
A. Under the New Testament, when Christ the substance was exhibited, the same covenant of grace was and still is to be administered in the preaching of the Word,[133] and the administration of the sacraments of Baptism[134] and the Lord’s Supper;[135] in which grace and salvation are held forth in more fulness, evidence, and efficacy, to all nations.[136]
Q. 36. Who is the Mediator of the covenant of grace?
A. The only Mediator of the covenant of grace is the Lord Jesus Christ,[137] who, being the eternal Son of God, of one substance and equal with the Father,[138] in the fulness of time became man,[139] and so was and continues to be God and man, in two entire distinct natures, and one person, forever.[140]
Q. 37. How did Christ, being the Son of God, become man?
A. Christ the Son of God became man, by taking to himself a true body, and a reasonable soul,[141] being conceived by the power of the Holy Ghost in the womb of the virgin Mary, of her substance, and born of her,[142] yet without sin.[143]
[126] Romans 15:8. Now I say that Jesus Christ was a minister of the circumcision for the truth of God, to confirm the promises made unto the fathers.
[127] Acts 3:20, 24. And he shall send Jesus Christ, which before was preached unto you…. Yea, and all the prophets from Samuel and those that follow after, as many as have spoken, have likewise foretold of these days.
[128] Hebrews 10:1. For the law having a shadow of good things to come, and not the very image of the things, can never with those sacrifices which they offered year by year continually make the comers thereunto perfect.
[129] Romans 4:11. And he received the sign of circumcision, a seal of the righteousness of the faith which he had yet being uncircumcised: that he might be the father of all them that believe, though they be not circumcised; that righteousness might be imputed unto them also.
[130] 1 Corinthians 5:7. Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened. For even Christ our passover is sacrificed for us.
[131] Hebrews chapters 8, 9, 10 (entire). Hebrews 11:13. These all died in faith, not having received the promises, but having seen them afar off, and were persuaded of them, and embraced them, and confessed that they were strangers and pilgrims on the earth.
[132] Galatians 3:7-9, 14. Know ye therefore that they which are of faith, the same are the children of Abraham. And the scripture, foreseeing that God would justify the heathen through faith, preached before the gospel unto Abraham, saying, In thee shall all nations be blessed. So then they which be of faith are blessed with faithful Abraham…. That the blessing of Abraham might come on the Gentiles through Jesus Christ; that we might receive the promise of the Spirit through faith.
[133] Mark 16:15. And he said unto them, Go ye into all the world, and preach the gospel to every creature.
[134] Matthew 28:19-20. Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you alway, even unto the end of the world. Amen.
[135] 1 Corinthians 11:23-25. For I have received of the Lord that which also I delivered unto you, That the Lord Jesus the same night in which he was betrayed took bread: And when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me. After the same manner also he took the cup, when he had supped, saying, This cup is the new testament in my blood: this do ye, as oft as ye drink it, in remembrance of me.
[136] 2 Corinthians 3:6-9. Who also hath made us able ministers of the new testament; not of the letter, but of the spirit: for the letter killeth, but the spirit giveth life. But if the ministration of death, written and engraven in stones, was glorious, so that the children of Israel could not stedfastly behold the face of Moses for the glory of his countenance; which glory was to be done away: How shall not the ministration of the spirit be rather glorious? For if the ministration of condemnation be glory, much more doth the ministration of righteousness exceed in glory. Hebrews 8:6, 10-11. But now hath he obtained a more excellent ministry, by how much also he is the mediator of a better covenant, which was established upon better promises…. For this is the covenant that I will make with the house of Israel after those days, saith the Lord; I will put my laws into their mind, and write them in their hearts: and I will be to them a God, and they shall be to me a people: And they shall not teach every man his neighbour, and every man his brother, saying, Know the Lord: for all shall know me, from the least to the greatest. Matthew 28:19. Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost.
[137] 1 Timothy 2:5. For there is one God, and one mediator between God and men, the man Christ Jesus.
[138] John 1:1, 14. In the beginning was the Word, and the Word was with God, and the Word was God…. And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth. John 10:30. I and my Father are one. Philippians 2:6. Who, being in the form of God, thought it not robbery to be equal with God.
[139] Galatians 4:4. But when the fulness of the time was come, God sent forth his Son, made of a woman, made under the law.
[140] Luke 1:35. And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God. Romans 9:5. Whose are the fathers, and of whom as concerning the flesh Christ came, who is over all, God blessed for ever. Amen. Colossians 2:9. For in him dwelleth all the fulness of the Godhead bodily. Hebrews 7:24-25. But this man, because he continueth ever, hath an unchangeable priesthood. Wherefore he is able also to save them to the uttermost that come unto God by him, seeing he ever liveth to make intercession for them.
[141] John 1:14. And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth. Matthew 26:38. Then saith he unto them, My soul is exceeding sorrowful, even unto death: tarry ye here, and watch with me.
[142] Luke 1:27, 31, 35, 42. To a virgin espoused to a man whose name was Joseph, of the house of David; and the virgin’s name was Mary…. And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name JESUS…. And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God…. And she spake out with a loud voice, and said, Blessed art thou among women, and blessed is the fruit of thy womb. Galatians 4:4. But when the fulness of the time was come, God sent forth his Son, made of a woman, made under the law.
[143] Hebrews 4:15. For we have not an high priest which cannot be touched with the feeling of our infirmities; but was in all points tempted like as we are, yet without sin. Hebrews 7:26. For such an high priest became us, who is holy, harmless, undefiled, separate from sinners, and made higher than the heavens.