Albert w. palmer states in paragraph 5 of the mountain trail and it’s messages that “john muir lived up to his doctrine.”in what ways did muir do this?

Question :
Albert W. Palmer states in paragraph 5 of The Mountain Trail and It’s Messages that “John Muir lived up to his doctrine.”In what ways did Muir do this?

Answer : 
John Muir lived up to his doctrine by not being the first man to reach the camp. He was no simple hiker. He would stop many times during his way up to examine trees, flowers, animals, nature, and everything that surrounded him. This means he didn't rush through life, he enjoyed every part of it.

I hope it helps
~Reema

Where's the excerpt? also i think the answer is the last one