Gnosticism is not a single religion but a family of related religious and philosophical movements that flourished in the 2nd and 3rd centuries CE, primarily within and around early Christianity. What unites them is the concept of gnosis β from the Greek word for "knowledge," but meaning not intellectual knowledge but direct, personal, experiential knowledge of the divine. Salvation in Gnostic thought comes not from faith or works but from this direct inner knowing.
Most Gnostic systems share a foundational cosmological myth: the material world was not created by the supreme God but by a lesser, inferior deity called the Demiurge (from Plato's Timaeus). The Demiurge β sometimes identified with the God of the Old Testament β created the material world through ignorance or arrogance, trapping sparks of divine light (pneuma) within human bodies. The supreme, unknowable God β the True Father, the Invisible Spirit, the Monad β is entirely beyond and above the material creation.
Human beings are therefore aliens in their own world β divine sparks imprisoned in material bodies, in a cosmos created by an imperfect deity, surrounded by archonic powers that seek to keep them enslaved. The Gnostic path is the path of awakening to this situation, recovering the knowledge of one's divine origin and eventually returning the divine spark to its source. The figure of Christ in most Gnostic systems is a revealer of this gnosis β a messenger from the True Father who brings the knowledge that liberates.