Iddhipada-vibhanga Sutta: Analysis of the Bases of Power
there is a sutta with a comment on light and how the practice can make the night as thought it is day, it is off the top of my head and I know it isn't correct as a quote, maybe someone has an Idea which one it is?
If this is the Sutta you're referring too, I've never quite thought of it in relation to what you've described, but it's as good an analysis as I've seen, since I've always found the passage a little strange:
Thanks that is the passage . . .
I have heard of some who after formal practice could see very clearly, like the light was on full, instead of turned down low (with the dimmer.)
I do think there is an aspect of, to use your words, erasing those arbitary associations, but there is also an aspect of being receptive to what is there, there is light at night time, and light in the day, it is the same light (from a sun/s) the only difference is the amount of light we get, and how we get it (directly or reflected,) and certainly it may not be as powerful, but it is still there.
part of the foundations of mindfulness, (as a seperate thing to the references) is an aspect of appropriate attention, setting aside greed and distress in regard to the world, and allot of the minor (i.e., likelihood of full medical intervention/hospitalisation for the condition is high) depressive disorders can be relieved with this appropriate attention, and even the major ones management can be helped using this.