Book excerpt: "The Ethics" is Aristotle's most important study of personal morality. For many centuries, it has been a widely read and influential book. Though written more than 2,000 years ago, it offers the modern reader many valuable insights into human needs since people have not changed significantly in the many years since Aristotle first lectured on ethics at the Lyceum in Athens. In this book, Aristotle insists that no known absolute moral standards exist. Any ethical theory must be based partly on an understanding of psychology and firmly grounded in human nature and daily life realities.