literal → temporal → figurative
Space moves from real geography (you are stuck) through temporary passage (you pass through) to declared metaphor (Beatrice says: souls don't live here, they appear here for you).
intellect → desire → capacity
The organizing principle shifts. Hell sorts by how much mind went into the sin. Purgatory sorts by what kind of love went wrong. Paradise sorts by how much light a soul can hold.
centripetal → ascending → centerless
Hell converges on Satan frozen at the center. The mountain climbs upward, shedding weight. Paradise has no privileged position — the Point is everywhere and nowhere, the Rose infinite.
“...e quindi uscimmo a riveder le stelle.”
“...puro e disposto a salire alle stelle.”
“...l’amor che move il sole e l’altre stelle.”
The word doesn't change. What changes is what it means.