Never have I met another man of such singleness of mind in his devotion to nature as Muir. He lived and moved and had his being as a devotee. … Of himself he took little heed, but no zealous missionary ever went abroad to spread the gospel with his fervor in communicating a love of nature. And with him a love of nature meant an understanding of her laws. He sauntered over the mountains, claiming kinship with the rocks and growing things and gathering them all to his heart. He has told me that he found it necessary, in getting people to listen, to tell them stories such as his immortal tale of Stickeen, but the real hope in his heart was to awaken their interest so they would want to go to nature themselves and to delve into the mysteries of her ways. … Every tree and flower, every bird and stone was to him the outward token of an invisible world in process of making.
John Muir