If I were to name the three most precious resources of life, I should say books, friends, and nature.
John BurroughsFew persons realize how much of their happiness, such as it is, is dependent upon their work.
John Burroughs[Theodore Roosevelt] was a naturalist on the broadest grounds, uniting much technical knowledge with knowledge of the daily lives and habits of all forms of wild life. He probably knew tenfold more natural history than all the presidents who had preceded him, and, I think one is safe in saying, more human history also.
John Burroughs