In more primitive religions, it is the shamans or priestly class which serve as the bridges between laymen and their deities. I can't think of any religion which does not have a central teaching figure or a group of teachers who proclaim and enforce the teachings. Yes, all religions do promote the same moral values. Some are more specific than others. The Bible states the ten commandments.
Pagans have just one.
This is also a complicated issue. Your quote is the basic tenet of Wicca. It has likely been accepted in one form or another ever since Man first formed social groupings. I try to avoid the topic, it gives me the creeps. Satanism could be considered an eclectic religion, but it's not something which descends to the level of devil worship.