“It is those who have compassion for all life who will best safeguard the life of man. Those who become aroused only when man is endangered become aroused too late. We cannot make the world uninhabitable for other forms of life and have it habitable for ourselves. It is the conservationist who is concerned with the welfare of all the land and life of the country, who, in the end, will do most to maintain the world as a fit place for human existence.”

“Those who wish to pet and baby wild animals "love" them. But those who respect their natures and wish to let them live normal lives, love them more.”

“Reduce the complexity of life by eliminating the needless wants of life and the labors of life reduce themselves.”

“It is morally as bad not to care whether a thing is true or not, so long as it makes you feel good, as it is not to care how you got your money as long as you have got it.”

“Our minds, as well as our bodies, have need of the out-of-doors. Our spirits, too, need simple things, elemental things, the sun and the wind and the rain, moonlight and starlight, sunrise and mist and mossy forest trails, the perfumes of dawn and the smell of fresh-turned earth and the ancient music of wind among the trees.”

“Who would fare better in this world of fitful time? Those who have seen the future and live only one life? Or those who have not seen the future and wait to live life? Or those who deny the future and live two lives?”

“Life throws the world at you, those who make a difference are those who catch the world and throw it back at life.”