What does "Ivory Tower" mean in a metaphorical sense?

An ivory tower is a metaphorical place—or an atmosphere—where people are happily cut off from the rest of the world in favor of their own pursuits, usually mental and esoteric ones.

- "is not only a luminous passive watcher in the night sky, but it is a powerful force.

it does symbolizes love,   lust   and dreaming and is seen as a power symbolic force that determines and affects human behaviors and reactions.

in the context of the question it does remain you that he events are only taking place at night and the reader of the passage of time."