Be sure to check the ones about Paganism/Polytheism! The mind-blowing thing about paganism is that unlike the 3 major religions of today, it didn't start with a holy book (orthodoxy), but with rituals. It's like a caricature of scientific method. We did so and so, and the harvest was good. Therefore, the ritual works. There is little point in learning who exactly the gods are or what they think. The important thing is not offending any of them, knowing which is responsible for what, and making deals with them. As long as the (sacrificial) ritual seemed to work, it would be repeated with the slightest detail. If it didn't, they would experiment. They were very open to change in practice, because with no word of god to rely on they knew they could only take imperfect glimpses into nature of gods.