In reply to Robert Durran:
It might be better to continue this discussion via PMs, but since I've written provocatively and publicly, I owe you an answer.
By "worship" I mean to adopt an attitude or disposition (intellectual and/or affective) towards "nature" that finds in it a source of ultimate meaning and value. There is then the question of whether such a form of worship is appropriate towards "nature". There is a strand in contemporary attitudes to "the natural" that tends to sacralize it, and I find that tendency in RM. "Silly" was put in for rhetorical effect: I don't think it really adds anything to my opinion since I think all nature worship is silly. Or perhaps I should have said "*largely* for rhetorical effect": it's not clear to me that if one is an atheist, it makes sense to adopt a stance of worship (as I've defined it) towards anything.
However, all that said, I don't think it's silly or a form of worship to be moved to intellectual and affective wonder, awe, and puzzlement by "nature" and humanity's place in it. Nan Shepherd captures that, for me, as do McCaig and Greig, and I can see that other people can read RM without finding tendencies to nature worship in his writing.