4. Baptist views cannot account for the language used of children in the New Testament. While it is true that Jesus did not baptize little children, what did he mean when he took little children and said, "Of such is the kingdom of heaven" (Matt. 19:13-15; Mark 10:13-16; Luke 18:15-17)? If, as our Baptist friends say, Jesus was simply speaking of childlike faith, he could have (would have?) used an adult with childlike faith as an object lesson, but he did not. On a Baptist model, how are children regarded as part of the kingdom of heaven (the visible representation of which is the church)?
Children of at least one believing parent are regarded as "holy"—separated unto God (1 Cor. 7:14). How are they regarded as such on a Baptist model? It is an evasion to say that this means the children of at least one believing parent are "legitimate." Paul would not have used a term connected with covenantal holiness if he wanted to say this. (Besides, children are "legitimate" whenever they are born in the context of the marital union.)
On a Baptist model, how is it that children are included among "the saints" in Ephesians 6:1-3 and Colossians 3:20 (cf. Eph. 1:1; Col. 1:2)? Paul gives specific instructions to husbands, wives, children, and servants because these were the basic constituents of a household in the first century. How can our Baptist friends instruct the children of their believing adults to "obey your parents in the Lord" (Eph. 6:1)? "In the Lord" does not mean that children should only obey "Christian" parents. Rather, it indicates that children should obey their parents in the context of their covenantal connection to Jesus Christ—which is signified and sealed in baptism. On a "household baptism" model, all of this makes sense. Baptist responses in any of the standard treatments are lame, at best.