Explicit = fully and clearly expressed or demonstrated; leaving nothing merely implied; unequivocal:
St. Peter fully and clearly expresses that when baptized, your sins are forgiven and you receive the Holy Spirit and that this promise includes children. Here again are his words as quoted by St. Luke:
Acts 2:38-39 ---> Peter said to them, "Repent, and each of you
be baptized in the name of Jesus Christ for the forgiveness of your sins;
and you will receive the gift of the Holy Spirit. For
the promise is for you and your children and for all who are far off, as many as the Lord our God will call to Himself."
---> Be baptized for the forgiveness of sins and you will receive the gift of the Holy Spirit.
1. Be baptized
2. Your sins will be forgiven
3. You will receive the Holy Spirit
4. This applies to your children
The Greek only further makes it clear. The word "for" is εἰς (
eis) and it too is a
preposition governing the accusative, and denoting entrance into, or direction and limit: into, to, toward, for, among..
Once again, if you think back to your basic primary school grammar, a prepositional phrase modifies verbs, which in Acts 2:38 is "
baptized." Thus, the action by which the forgiveness of sins occurs is
being baptized. This is true in English and Greek.
As for Romans 6 and Romans 10, how have I ignored them? That's like me saying you ignored 1 Cor 10. They haven't been introduced. Recall we are discussing
infant baptism and Acts 2:38 was introduced because it contains an explicit statement that baptism includes children.