"In those warm first day of summer when the world is large and cordial, the chubby caterpillar crawls upon some log or limb or walkway each morning for little reason other than that the courses of the log or limb or walkway are there and that crawling is innately the business of caterpillars. The greening earth provides food at every turn of each day's paths, and the infant butterfly eats at will and by opportunity, innocent of its coming purposes." ( Phyllis Tickle, The Shaping of a Life, Doubleday, 2001, 378.)