AF said:

And this teaching from scripture, please?

And the Scripture replies clearly, again:

8:35 Then Philip opened his mouth, and began at the same scripture, and preached unto him Jesus.
8:36 And as they went on their way, they came unto a certain water: and the eunuch said, See, here is water; what doth hinder me to be baptized?
8:37 And Philip said, If thou believest with all thine heart, thou mayest. And he answered and said, I believe that Jesus Christ is the Son of God.
8:38 And he commanded the chariot to stand still: and they went down both into the water, both Philip and the eunuch; and he baptized him.

Note please the following:

Phillip, under the guidance of the HS doesn't say if you believe that Baptism is a sign of the objective reality of God's promise, etc or what ever. No, his response was that what would hinder him from being baptised, mark it, was if he didn't believe with his whole heart. The Ethopian Eunich then made a profession of faith in Christ as the Son of God, Whereupon the chariot was stopped and he was baptized. Now I submit that this teaching is rather clear.

Complicate it, obfuscate it or deny it in order to cling to your view of baptism, but the teaching of scripture remains clear and simple, so that a child may understand it.

In Him,