Question

It seems wonderful that so frail and lovely a plant has such power over human hearts. This Calypso meeting happened some forty-five years ago, and it was more memorable and impressive than any of my meetings with human beings excepting, perhaps, Emerson and one or two others. When I was leaving the University, Professor J.D. Butler said, "John, I would like to know what becomes o you, and I wish you would write me, say once a year, so I may keep you in sight." I wrote to the Professor, telling him about this meeting with Calypso, and he sent the letter to an.Eastern newspaper [The Boston Recorder] with some comments of his own. These, as far as I know, were the first of my words that appeared in print.

Explain how the bolded words above reveal Muir's attitude about nature. (The first 2 sentences are in bold letters)

Answer 1

Actually only the first sentence has any connection to nature, the following one:
It seems wonderful that so frail and lovely a plant has such power over human hearts

First, Muir is aware of the delicate nature of nature ("frair"), and is appreciating it ("it is lovely").
Further, Muir is appreciating and in wonder of the power of nature, which, although delicate, has a great influence over humans.