"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."

“None of Nature's landscapes are ugly so long as they are wild.”

“Man has injured every animal he has touched.”

“When night was drawing near, I ran down the flowery slopes exhilarated, thanking God for the gift of this great day. The setting sun fired the clouds. All the world seemed new-born. Every thing, even the commonest, was seen in new light and was looked at with new interest as if never seen before.”

“All the wild world is beautiful, and it matters but little where we go, to highlands or lowlands, woods or plains, on the sea or land or down among the crystals of waves or high in a balloon in the sky; through all the climates, hot or cold, storms and calms, everywhere and always we are in God's eternal beauty and love. So universally true is this, the spot where we chance to be always seems the best.”

“Sit down in climbing, and hear the pines sing.”

“The sun shines not on us but in us. The rivers flow not past, but through us, thrilling, tingling, vibrating every fiber and cell of the substance of our bodies, making them glide and sing. The trees wave and the flowers bloom in our bodies as well as our souls, and every bird song, wind song, and tremendous storm song of the rocks in the heart of the mountains is our song, our very own, and sings our love.”