gnostic
[nos-tik]
1.
pertaining to knowledge.
2.
possessing knowledge, especially esoteric knowledge of spiritualmatters.
3.
(initial capital letter) pertaining to or characteristic of the Gnostics.
4.
(initial capital letter) a member of any of certain sects among the early Christians who claimed to have superior knowledge of spiritual matters, and explained the world as created by powers or agencies arising as emanations from the Godhead.
From: http://dictionary.reference.com/browse/gnostic