It's very quick. Most of them are from the Gospels. People claim it is gnostic because of the first one, as if you must attain some sort of special knowledge to live forever, but it's because they don't truly understand how one is saved imo. It is perfectly consistent. It's like what gnarly was saying about how the unsaved cannot understand.

http://www.gnosis.org/naghamm/gosthom.html