Note 10 — Chapter LXXXXVII · The Magnitude of the Sphere of the Intellect.
Viharilala Mitra translation
The allegory of the three spheres, means no more than the triple state of man, as a spiritual, an intellectual and a physical or corporeal being. The intellectual state in the text, is properly the spiritual and highest state of a human being. The mental is next to the intellectual or midmost state of man, and the physical or corporeal state, is the lowest condition, in which the elevated nature of humanity is subjected like an inferior animal, to grovel upon the earth.