Franz Cumont,
The Oriental Religions in Roman Paganism
“ Lacking the recognized authority of official creeds, the Oriental religions had to appeal to the passions of the individual in order to make proselytes. They attracted men first by the disturbing seductiveness of their mysteries, where terror and hope were evoked in turns, and charmed them by the pomp of their festivities and the magnificence of their processions. Men were fascinated by the languishing songs and intoxicating melodies. ”
