Yes, I think it would be fine to say we are the Sun and the Moon, respectively. The world and sky of our disparate souls nicely encapsulated. To simple metaphor.
Yes. But it is incomplete, you know. For sun may never touch moon, and Day has no place in the dominion of the nocturnal. And the moon can have no adequate view (but a sidelong glance) at man and Earth in the sun's hand.
No, I can touch you and you me. Still more, I can see you and grow familiar with what you beam upon; Lie with the subtlety of a new night's descent with my eyes twinkling nonplussed to the crux of neck and shoulder.
Yes. We are, you and I, the Sun and the Moon, if you say we are. For you cast back the dark and shun the dark places. And the thin veil and living line that keeps days apart, the Night, is the one corner upon which I fear you shall never Intrude.