Our normal connection to the domain of possibilities or the non-physical part of our being is intuition.
The results of queries into actualized past reality state vectors and possible future reality state vectors. Equivalent with memory from this perspective. More on actualization.
The domain of possibilities holds all the answers we might seek instantaneously accessible to any consciousness that focuses its intent on particular questions. Intuition is the result of such a query.
Much of our imaginative credibility draws on unactualized part and future state vectors for content and narrative. How it could have been feels quite real when told as a supposedly fictional narrative.