How can infant baptism come from God when He has ordained it for only those who repent and believe? If God hasn't commanded us concerning our children except only to train them up in the word, and in the way they should go, then you add to scripture, and He has something to say about that.
Wonderful question, JamesJohn. I think this is a very important question we all must dive into from time to time, especially with so much disagreement on this subject.
If it's the Christian equivalent to circumcision, then we ought to look at how circumcision is administered...it could be administered to adult converts to Judaism who had to have personal faith in the God of Israel, but it could also be given to the infants of those who were Hebrews so that they could share in the blessings of God's covenant -- even before they had a conscious understanding. Consequently, the same thing happened with baptism; we can either embrace the Christian faith as adults -- with personal faith in Christ and be baptized -- or we can be baptized as children of believers so that we might share in the New Covenant and its blessings, even before we can understand those. This is why, for instance, in Catholicism, while an infant may be baptized, adults and teenagers aren't baptized instantly because they can, like the Jewish adults, hold a personal faith in Jesus. This is why teens and adults go through RCIC and RCIA before baptism and profess their faith first.
So the position that those who do accept infant baptism is that this is something God instituted with circumcision as the predecessor and that we carry on through the New Covenant. Though we especially honor the notion that those at the age of reason must do one thing before the other.
Paul links the connection between circumcision and baptism in Colossians 2 where he said we have received the circumcision of Christ having been buried with him in baptism.
Which scriptures clearly command us to submerge our children in the waters of baptism? Where is it commanded that we baptize someone without their consent, or without their profession of faith?
You and I are meeting half-way on this, which is good
There is no direct verse where it says "baptize infants as well as adults," just as there is also no verse that says "Do not baptize infants, for baptism is only for those at the age of reason."
Having said that, as you know, there are passages that talk about whole households being baptized, and certainly raises the possibility (some might argue probability) that there were infants or people below the age of reason being baptized.