Because Twain's writing is very inspiring and encouraging
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.
It means he wasn't kind to the old man because saying he wasn't never kinder to the man during the whole week then killed him
