What are the motifs in The Wild Muir: Twenty-two of John Muir's Greatest Adventures by John Muir?

While the reader might be most impressed by Muir's climbing prowess, his unusual ability to survive extreme weather conditions, and his enormous risk-appetite, Muir is much less interested in himself than he is in his surroundings. Almost all of the Wild Muir is filled with records of Muir's observations. He rarely focuses on himself but is always stunned by nature. When Muir quits working as an engineer in Indianapolis after an accident, he spurns "man's inventions" in favor of "God's inventions" in nature. He comes to develop a deep spirituality based upon Muir's profound sense of connection to animal and plant life as well as the geography of the world.