It might be nitpicking (and I'm not a native English speaker so in English the words might have some connotations that I'm not aware of), but here is my view why the suggested words in my opinion don't fit the feeling.
> bliss
It's not about happiness - the world is still bad - but about deep understanding.
>awe
It's not that I'm intimidated by it - it's just the feeling of having understood something really deep
> epiphany
it comes near, but epiphany is (as far as I understand it) the feeling of the sudden realization (which is different), but I talk the feeling that you have afterwards. While in panel 2 of
> https://xkcd.com/230/
the feeling is clearly "epiphany" the later panels transport a different feeling (a much less "striking" one) - the latter is the feeling I mean.
> It is just that most people don't get satisfaction from such things.
But they might get the same feeling from other stimuli.
The "elegant math proof" feeling was just the description of a feeling that at leas some HN readers seem to be able to empathize with - I also had much stranger feelings under meditation (that I never had in "ordinary" life) that are even much harder to describe (and I only had them one or two times - so my descriptions might even not be very accurate).