Lang said: “Finally, one question about the post: what about vēdanā arising from mind input? Does it also start as upekkha vēdanā, and then (for a normal human) turn automatically into dōmanassa or sōmanassa vēdanā?”.
Yes.
– But it needs to be kept in mind that we will not be able to discern the “initial upekkha vedana” in any of these. The follow-up with “samphassa ja vedana” happens within a split second (based on our gathi). We do not have any control over that.
– What we can do is to change our gathi over time. Then with time, “samphassa ja vedana” will diminish.