Gnosis
[Greek, literally “knowledge”; also translated as “understanding,” “insight,” or “acquaintance”] As used by the early Christian Gnostics of the second century, gnosis was not rational or intellectual knowledge but self-knowledge—that is, knowledge of God or knowledge of the self as God; the “acquaintance” with, or recognition of, the divine element that constitutes the Real Self.
See also
Sources
1988 Pearls of Wisdom, book 1, introduction.