"e;The Birth of Tragedy"e; stands alongside Aristotle's "e;Poetics"e; as essential works for all who seek to understand poetry and its relationship to human life. In this, his first book, Nietzsche developed a way of thinking about the arts that unites the Greek gods Apollo and Dionysus as the central symbol of human existence. Although tragedy serves as the focus of this work, music, visual art, dance, and the other arts can also be viewed using Nietzsche's analysis and integration of the Apollonian and the Dionysian.