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It is an incalculable added pleasure to any one's sum of happiness if he or she grows to know, even slightly and imperfectly, how to read and enjoy the wonder-book of nature.

Theodore Roosevelt (1990). “Outdoor Pastimes of an American Hunter”, p.339, Stackpole Books
It is an incalculable added pleasure to any one's sum of happiness if he or she grows to know, even slightly and imperfectly, how to read and enjoy the wonder-book of nature.