You see this idea echoed in Hermetic Qabalah as the "Four Worlds" - the world of action & physical materiality, the world of psychology, thought, feeling, & egoic consciousness, the world of creativity, and the world of archetypal abstraction.
The Hermetic influence comes from the assertion that the three immaterial worlds of the "soul" or "mind" (synonyms with the same referent) are in some sense equal to, or at least intertwined with, the material body, in a mutually reciprocal dance: "As above, so below; as below, so above."
For some 20th century texts in this neighbourhood: The Three Initiates' primer on occult studies The Kybalion, Dion Fortune's Mystical Qabalah, and the classic Qabalistic reference: Liber 777 by Crowley (or its updated, more legible version, Liber 776 1/2 by Eshelman). The works of Israel Regardie such as The One Year Manual or The Middle Pillar are also good for grounding occult studies in more psychological or psychotherapeutic language which is a good moderating influence when experimenting with pretty out-there material.
Be careful with the meaning of words in this field.
Notes, photos, emails from loved ones, legal documents are less important than unused hd capacity?