Why Do We Baptize by Dunking People All the Way in Water? | The Mars Hill Blog.

The Mars Hill translation of Hebrews 9.8-10?

By this the Holy Spirit indicates that the way into the holy places is not yet opened as long as the first section is still standing (which is symbolic for the present age). According to this arrangement, gifts and sacrifices are offered that cannot perfect the conscience of the worshiper, but deal only with food and drink and various immersions, regulations for the body imposed until the time of reformation.

Right. Just read Leviticus. It is full of ceremonial immersions.

And thus Hebrews 10.19-23:

Therefore, brothers, since we have confidence to enter the holy places by the blood of Jesus, by the new and living way that he opened for us through the curtain, that is, through his flesh, and since we have a great priest over the house of God, let us draw near with a true heart in full assurance of faith, with our hearts dunked clean from an evil conscience and our bodies immersed with pure water. Let us hold fast the confession of our hope without wavering, for he who promised is faithful.

Not that the word “baptism” is in these later verses. But I’m just following through from the versions of the OT “washings” that is demanded by the new revised version of Hebrews 9.10.