ANSWER: It is not personal, internal sanctification, but dedication. In heathenism children from their conception were dedicated to idols and demons, at least seven. If one parent becomes a believer and the other consents to this change of religion, the supposition is that the newly born child is now, through the influence of the Christian partner, dedicated to God, and the consenting pagan parent has, to a certain extent, yielded to Christian influences. In India, he or she breaks caste by so doing, and is no longer regarded as a heathen. Such are now withdrawn from the pollutions of idolatry and are on the way to personal salvation. In this text "sanctify" is used in a peculiar sense.
— Steele's Answers p. 192.