An intuitive knowlege of spiritual truths. thefreedictionary.com/gnosis There were many Gnostic “systems” of beliefs in early Christian times. There was Christian Gnosticism, which the Church declared to be heresy. Basically, people are allowed to be their own prophets-- personal revelation is public. Reason is not important, neither are commonly held truths, or any stable core of doctrine.
Cafeteria Mormonism in truth-- so long as you hold to the lifestyle, you can pick and choose among the theological statements and historical facts.
Here are some statements about ancient gnosticism-- see how it matches:
I beleive that the DaVinci Code is another example of neo-Gnosticism.