This study is to seek an answer of the question on the famous old song . What kinds of factors that the song contains could make such deep impressions on people`s mind through history? In the book of Samgukyusa(『三國遺事』) there is a notable paragraph that ``Songs of Hyang-ga could affect the god of heaven and earth(感動天地鬼神)``. So as the first step toward the answer, this study traced the origin and reviewed the references of that paragraph among the old documents of China and Korea. ``Affecting the god of heaven and earth`` is one of the key factors to explain the requirements of good literature traditionally in old Asia. And that stands for a deep impression not only as emotional reactions but also as illuminations to the world and universe. deepen the impression by its expression and structure. With such impressions the song could relieve people from the fear of death.