One of the interesting things about religious practice in the Hellenized pre-Christian world was the popularity of “mystery religions.” They are called that because their rites and beliefs are mysteries to us. They left no writings behind explaining their religions because their religions were secrets only for the initiated to know about.
Mystery religions, or “cults,” are looked down upon today. Christianity, being monotheistic (or maybe tri-theistic), doesn’t look kindly about cults dedicated to worshipping other gods. When people learn that their kid has joined a “cult,” they frantically start searching for someone who can “deprogram” them. But back in pre-Christian Hellenized times, they believed in a large pantheon of gods, so someone in a cult worshipping another god wasn’t any more alarming than being in a bowling club today.
There are only two major mystery religions in the United States today, Mormonism and Scientology. They are mystery religions because they don’t tell converts the “secrets” of the religion right away. Scientologists don’t get to find out about Xenu the Galactic Overlord and Mormons don’t get to find out that God came from the planet Kolob* until they have moved up in the religion enough to be worthy of learning the secrets.
But how do I know the secrets? The answer is that there are no secrets in the age of the internet. Mystery religions simply don’t work today. To see how a modern religion is created and spread, one must study Gaiaism, which is destined to become the first internet-age religion.
* The first time around, I accidentally wrote "Kobol" which is the planet in Battlestar Galactica. Glen Larson, the creator of the original Battlestar Galactica, was a Mormon.