Greek mythology consists of a rich collection of works referring allegorically to the origin of the world; they describe scientific physical and metaphysical phenomena hidden symbolically in the adventures of a wide variety of gods, heroes, heroines and other creatures. These stories originally formed through an oral poetic tradition before they were documented and spread through the works of Hellenic literature. The myth is a story that goes back to prehistoric times, as opposed to history, which recounts events that date back to historic times.
Mythology is divided into two categories; stories and the symbolism. Mythology contains the stories and the narrations of times older than History, thus makes mythology the older sister of History. Through the myth we learn the story of the deities, the right offerings for them and how we should behave. The symbolism teaches the initiates the old science which was encrypted with poetic forms. Knowing mythology is necessary to understand the oldest ancient texts and the others which were based on them. For the followers of the old ways, it is a source of knowledge and understanding/insight of or the holy faith to the Gods and Goddesses based in the most ancient times. As Proclos writes on his Commentaries on Plato's Politeia, the writers of the myths knew the hierarchy of the Gods and they direct their myths to heaven, so that each element of the myth is connected with its divine element. For him, the ancient myths contain secret teachings and Proclus had a system of symbols and their meanings, which gave new dimension on ancient myths (Reading Neoplatonism, Sara Rappe).
Theurgy and Philosophy are two different methods which lead to the union with God.