With their differences being so far apart, why do you think these men were still capable of being such close friends?

Because they liked eachother? I don't know.

adverb is the answer i believe.

- "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."