Gnosis is illuminative and unitive knowledge and therefore...

Gnosis is illuminative and unitive knowledge and therefore it is natural that theoretical gnosis be concerned with knowledge as such, primarily sacred knowledge and knowledge of the sacred but also with the grades and the hierarchy of knowledge.67 It is true that most traditional philosophies, including the Islamic, also deal with this issue, but it is only in works on theoretical gnosis that one finds the most universal treatment of this subject including of course supreme knowledge that is gnosis itself.

Theoretical gnosis or scientia sacra is also the metaphysics that lies at the heart of perennial philosophy understood…