Gnosis, Greek for knowledge, is a theological term to designate personal spiritual experiences and interpretations.

Many modern polytheists prefer to label their gnosis using more specific language. UPG, Unverified Personal Gnosis, is gnosis that belongs to a single individual. SPG, Shared Personal Gnosis, is gnosis that is shared between several practitioners, usually stemming from sharing their UPG in a group setting and finding that others have had similar experiences. VPG, Verified Personal Gnosis, is gnosis that is shared with ancestral practitioners, usually after a modern individual finds primary sources that agree with their own personal experiences.

There is recent debate on the usefulness of UPG and SPG as frameworks, and some polytheists have proposed that this creates a false dichotomy between historical reconstruction and contemporary, lived experience.¹⁾