Q. 73. Seeing the Infants of Believers are in the Covenant of Grace with their Parents, as some say, why may not they be baptized under the Gospel, as well as Abrahams Infant Seed was circumcised under the Law?
4. We must know the Covenant made with Abraham had two parts: first, a spiritual, which consisted in God's promising to be a God to (e) Abraham, and (f) all his Spiritual-Seed in a peculiar manner, whether they were circumcised or uncircumcised, which believed as Abraham the Father of the Faithful did. And this was signified in God's accepting such as his People which were not of (g) Abrahams Seed, but brought with his Money, and this Promise was sealed to Abraham by Circumcision, that through Jesus Christ (whom Isaac typified out) the Gentiles, the Uncircumcision which believed, should have their Faith counted for Righteousness, as Abrahams was before he was circumcised.
(e) Gen. 17.19, 21. Gen. 21.10. Gal. 4.30.
(f) Acts 2.39. Rom. 9.7, 8, &c.
(g) Gal. 3.16, 28, 29.
(h) Rom. 4.9, 10, 11, 12, 13, 14.
5. This Promise consisted of temporal good: so God promised Abraham's Seed should enjoy the (i) Land of Canaan, and have plenty of outward blessings, so sealed this Promise by Circumcision. It was also a distinguishing character of the Jews being God's People from all the Nations of the Gentiles, which as yet were not the Seed of Abraham: but when the Gentiles came to believe, and by Faith became the People of God as well as the Jews, then (k) Circumcision, that distinguishing Mark, ceased; and the character of being the Children of God now is Faith in Christ, and Circumcision of the Heart. So that whatever pretence there may be for the Infants of Believers to be Baptized first, as their being the Seed of Believers; or 2ndly, their being in the Covenant; or 3rdly, that the Infant-Seed of Abraham a Believer, was circumcised; all this you see avails nothing: for Circumcision was limited to such a Family, the Family of Abraham, all others, though Believers, were excluded; also limited to such a day, the eighth day, and what ever pretence might be made, it was not to be done before nor after; limited also to such a Sex, the Male, not the Female, which if Baptism came in the room of Circumcision, and is the Seal of the Covenant under the Gospel, as Circumcision was under the Law, none but the Males must be Baptized, because none but the Males were Circumcised; but as under the Law respecting Circumcision, so now under the Gospel respecting Baptism, it depends purely upon the will of the Law-giver, at what season, upon what Persons and terms Baptism is to be administered; unto which Prophet we shall all do well to hearken, Act. 3.22.
(i) Gen. 15.18. Gen. 17.8, 9, 10, 11. Gen. 12.6, 7. Gen. 13.15, 16, 17. Gen. 15.16.
(k) John 1.12. Rom. 2.28, 29. Phil. 3.3. Gal. 3.26, 27, 28.