In this episode of The Hall of Mysteries, join the Mahdi Aba Al-Sadiq (from him is peace) as he unravels one of the most guarded secrets in ancient thought. Across every civilization, there were whispers of unseen forces moving within man, shaping his emotions, his health, and his destiny. Who are these spirits the ancients spoke of? What hidden science linked the gods of old to healing, inspiration, and war? And what lies behind the mystery of possession that has haunted humanity since the beginning?