if we were to start reading the New Testament from the beginning, we would not be able to get very far before we encountered something called baptism. As early as Matthew 3:1, we run into a man by the name of John, who is otherwise known as “the baptizer,” and, a few verses later, we see why. This John, we are told, devotes his life to “baptizing” many different people (vv. 6, 7, 11), the Lord Jesus Himself being one of them (vv. 13–17). The baptisms that we encounter in these early chapters of Matthew’s gospel are described simply as occurring. Very little explanation is given as to how they were performed or why they were performed. We are left to conclude that the practice of “baptism,” whatever it is, must have been something that was familiar to Matthew’s Jewish audience in the first century. The same thing can be said for all the baptisms that we see in the New Testament. Thus, when Jesus commands His followers to go and make disciples in Matthew 28:18–20, He instructs them to...