I suspect most, if not all, regulars will dismiss these stages as soon as reading convinces them that the words "rational" and "mystical" are being used in the right sense. That is, few here would be impressed by "enjoying the mystery of nature".
I don't think that "enjoying the mystery of nature" is an apt description of that last stage. My impression is more that it's about appreciating the things that can't be said; i.e., of the "he who speaks doesn't know, and he who knows doesn't speak" variety.
There are some levels of wisdom that can't be translated verbally without sounding like useless tautologies or proverbs, so if you insist on verbal rationality as the only worthwhile knowledge, then such things will remain outside your worldview. So in a sense, it's "mystical", but without being acausal, irrational, or supernatural.
I've often had half-finished LW post ideas and crossed them off for a number of reasons, mostly they were too rough or undeveloped and I didn't feel expert enough. Other people might worry their post would be judged harshly, or feel overwhelmed, or worried about topicality, or they just want some community input before adding it.
So: this is a special sort of open thread. Please post your unfinished ideas and sketches for LW posts here as comments, if you would like constructive critique, assistance and checking from people with more expertise, etc. Just pile them in without worrying too much. Ideas can be as short as a single sentence or as long as a finished post. Both subject and presentation are on topic in replies. Bad ideas should be mined for whatever good can be found in them. Good ideas should be poked with challenges to make them stronger. No being nasty!