Complex sentence: Most of the Zoroastrians of Asia continue to use the Vendidad as a valued and fundamental cultural and ethical moral guide, viewing their teachings as essential to Zoroastrian tradition and see it as part of zoroastrianism original perspectives about the truth of spiritual existence.
Split into simpler sentences: Most of the zoroastrians of Asia continue to use the Vendidad as a valued and fundamental cultural and ethical moral guide, viewing their teachings as essential to zoroastrian tradition. And seeing it as part of zoroastrianism original perspectives about the truth of spiritual existence.