When does Steinbeck use the "Song of the Family?" When is the "Song of Evil or Song of the Enemy" used?

Certain moments in Kino's life seems to correspond with a song in his head. KIno's story is filled with extreme emotions. In Chapter 1, when he is content with family, he hears the Song of the family. When he feels dishonesty or violence, he hears the Song of Evil. These songs become symbols in Kino's mythic life. The stories that Kino has heard were brought down by oral tradition. They were myths to help guide him through life. It is only fitting that these songs are metaphors to what he is experiencing in reality. They are cautionary tales that help Kino and his people navigate through adversity. They are appropriate for both Kino and Juana as they face the perils of greed and violence. The songs help them sift through what is urgent and what is not.