The document discusses ancient Greek oracles and methods of divination. It describes several major oracles including Delphi (associated with Apollo), Dodona (associated with Zeus), and Epidaurus (associated with Asclepius the god of healing). The oracle priests and priestesses would use various techniques like inhaling vapors, dreaming, or interpreting natural phenomena to transmit prophecies. While oracles' messages were often vague, they were widely trusted and consulted about important matters like war, marriage, and medicine. Famous myths and figures like Oedipus and Croesus illustrate oracles' predictions coming true.