«كل فلك متحرك بالدوام»
Every celestial sphere is perpetually moving.
Within the older cosmological framework used by the book, this illustrates an affirmative permanent proposition. The text also supplies a permanent denial of rest to that sphere. Logically the example links predication to the whole duration of the subject's existence.
The old celestial-sphere model should not be presented as a verified claim of modern physics. For understanding the logical form, the essential point is that “permanently” means continuous predication, not automatically “necessarily.”