Since the days of the apostles wrote:
Believers that have believed baptist doctrine start at Pentecost with the original disciples

Affusion is the correct method of the Biblical baptism of infants who were the children of covenanted parents.

Todays Baptist church is only a couple, maybe three, centuries old.
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Mike NY wrote:
He surely did make all things, including the brain, which he sovereignly expects us to use rightly.