Shamanism

"Because it is not an organized religion as such, but rather a spiritual practice, shamanism cuts across all faiths and creeds, reaching deep levels of ancestral memory. As a primal belief system, which precedes established religion, it has its own symbolism and cosmology, inhabited by beings, gods, and totems, who display similar characteristics although they appear in various forms, depending upon their places of origin."

~John Matthews, The Celtic Shaman