My first introduction into "mystic religion" through American Indian spirituality.
Most pre-christian original "religion" were polydiest. Even pre-abraham, there is believed to have been a polydiest belief amoung the "hebrews".
With my own study and experiences around indian ceremony, beliefs, etc., is that the animals trees rocks and water are not worshipped, but honored for what they bring and teach, in both the physical and spiritual realm, and a means of understanding life and the Great Spirit (god, creator, supreme being), and the Great Mystery (creation, what's beyond the heavens we see, what happens after we die). In Lakota (Sioux) the Great Spirit has been known as Tunkashilla. Since the influence of Chrisianity in the last 200 years on the Sioux, Tunkashilla, in many circles, has become more of a Christ-like figure.
I've explored wicca some. I find it facinating. However, I am far more comfortable with indian spirituality than the wicca - neo-pagan I've encountered because they seem to be making much up as they go, because so much has been lost. The indian spirituality has only been disrupted in the last 150 to 400 years, not the 1500-2000 years of christian invasion, and has been underground only since the indian wars. It has even been illegal for an indian to practice sweatlodge in many states up until the 1970's!
Mitakeye Oasin (all my relations)