THE SAVING KNOWLEDGE. The Greek word gnosis means “knowledge”. However, the Gnostic literature does not refer to any knowledge. Gnosis is an outstanding knowledge.

...in all religions one can encounter the idea of the metaphysical liberation of man through gnosis, that is to say, through the integral knowledge; There is a surprising universality in some symbols and in some myths: and therefore we can derive the logical postulate of a common origin of the different religious esoterisms, which necessarily are expressed through the great “exoteric” religions, whose core they are.