"The Roofless Mind" — Adi Da Aletheon
In the ancient cultural setting, the mind, the brain, and the head were not “sealed”.
However, in this “late-time” (or “dark” epoch), a different presumption about existence has been progressively introduced — the negative presumption that the mind is fixed in the data of the gross sensory domain of conditional manifestation.
By that negative presumption, there is no Infinite Upwardness or Beyondness presumed, or even allowed.
Indeed, by that negative presumption, the “room” of mind has come to have a solid “ceiling” (as if of stone or steel).
By that negative presumption, there is not anything Above — but there is (by that presumption) only the “horizontal” directness of the senses, and (therefore) there is only a physical (material, mortal, and exclusively conditional) basis for existence (and nothing “knowable” — or even existing — Beyond the physical).
–Parama Sapta Na Adi Da Samraj, Aletheon page 392
–Watch video on the creation of Adi Da’s Masterwork, The Aletheon.