The fourfold root of the principle of sufficient reason is this (Schopenhauer developed his ideas about space and time from reading the Vedas with Goethe!):
Earth: Empirical world; every "thing-in-itself",
Water: Understanding; The passive pool of memory, memory we are aware of, and memory we are not.
Fire: Reason; Interacts with the passive pool of memory innumerable times in any given second. The reason uses the pool of understanding to create new scenarios. Reason is active, understanding is passive; they are superimposed.
Air: Will; spirit
SUFFICIENT REASON ONE TIME REMOVED:
Earth = Space
Air = Time
Water + Fire = Cause and effect
SUFFICIENT REASON TWO TIMES REMOVED ( transformed into a method):
Earth: A human being
Water: Master Table
"Pull Strip" is where Water + Fire meet.
Fire: Semantic Staff
Air: Will... the emergent result
Two times removed is in Schopenhauerian terms "double representation"
Double representation is the plane of magic; it is the mode under which the mind operates. What is the mind? A representation of a representation.