In this book, the author 
In this book, the author argues that "we learn to prefer imperfect theories...to digested systems which have no one valuable suggestion" after illustrating a point by quoting some stanzas from George Herbert's "Man." This essay's author defines the Imagination as "the use which the Reason makes of the material world" in its ambivalent chapter on "Idealism." The title concept is identified as "the symbol of spirit" in the third proposition explored in this book's chapter on "Language." This essay's author declares, "I am nothing; I see all; the currents of the Universal Being circulate through me," in a passage about becoming a "transparent eyeball" while immersed in the title entity. For 10 points, name this first book by Ralph Waldo Emerson.