Justin Taylor of Crossway has an interview today on The Gospel Coalition website with Dr. Stephen J. Wellum of Southern Baptist Theological Seminary on credobaptism. I agree with the way that Dr. Wellum lays out the case, and he does it very well: succinctly and completely.
After explaining that paedobaptist Reformed theology “flattens out” the covenants and wrongly — and perhaps simplistically — equates Old Covenant Israel with the New Covenant church, Taylor asks, “What does that have to do with baptism?”
Everything. Under the old covenant, one could make a distinction between the physical and spiritual seed of Abraham (the locus of the covenant community is different from the locus of the elect). Under the old covenant, both “seeds” (physical and spiritual) received the covenant sign of circumcision and both were viewed as full covenant members in the national sense, even though it was only the remnant who were the true spiritual seed of Abraham. But this kind of distinction is not legitimate under the new covenant where the locus of the covenant community and the elect are the same. In other words, one cannot speak of a “remnant” in the new covenant community, like one could under the old covenant. All those who are “in Christ” are a regenerate people, and as such it is only they who may receive the sign of the covenant, namely baptism.
You can read the complete interview at The Gospel Coalition website: Why I am a Credobaptist.
Wellum and co-author Peter J. Gentry have a book coming out next June (cover shown above) which could be a groundbreaking reference: Kingdom through Covenant: A Biblical-Theological Understanding of the Covenants.