Ramification of the Experience

[JustLikeYou]

For the STO entity, is it simply a matter of climbing the ladder of transcendence to see the Supreme Good, and realizing that Good is immanently permeating all things?

This is, more or less, a restatement of Ra's description of contact with intelligent infinity. However, it is not necessary, for the purposes of Harvest, to make contact with intelligent infinity. It is enough to just prefer the good and find the evil unappealing.

Is the "harvestability" of a 3D entity simply the choice of seeing things in a positive light or negative light, rather than an unfocused light?

I think that depends on how you understand the term "seeing things." As Plenum's comment suggests, some amount of faith is going to be necessary for achieving polarity in any direction. So if "seeing things" involves the faith requisite for being vulnerable toward and accepting of other human beings as a gut-response, then I think you've got it right.