I had to go eat, but I'm back! Wanted to post a bit more on a couple spiritual systems I glossed over above.
The one common trait, perhaps, between the Vikings and the Amerindians generally was that they perceived reality to have emerged more or less spontaneously from the primordial chaos. The Viking gods were not omnipotent; they were not omnisicient; they were by no means infinite or even eternal. They were certainly well beyond the capacity of men, but in little more than a sense of being "supermen" - they were all the features of humanity writ large. And not only could they die, but they would die, and then another universe would be born of the ruins, with its own reality and its own Truth.
Quite similarly, a common strand of much Amerindian philosophy was that the phenomenological world emerged gradually as a sort of nexus of all the spiritual and material entities within it. Reality was a dynamic function and the Truth was everchanging as it shaped and was shaped by the recombination and rearrangement of forms in the flux of time. One might say that it was a very holistic spiritualism, and the reality of the universe was akin to a growing, living creature.
Neither Vikings nor Amerindians would comprehend the statement "God is Truth" within the context of their pre-Christian spiritual beliefs.
An interesting aspect of both Norse and American Indian mythology, as well as Roman and greek mythology, is how consistant the histories fit with reported geneologies of angels, fallen angels, and pre-Noahbic legends. Many were spoken of as being offspring of creatures with supernatural abilities, yet also distinct personalities. Others were described as having been chained in the Abyss.