A short, sad love poem about someone who arrives like light and leaves too soon. The speaker begins by praising the loved one as a moon in the darkest night, a gentle glow that makes the dark bearable. Then comes the disappointment: "forever" turned out to mean "a couple nights." The speaker heard a promise of a lifetime, and what they got was a brief visit.
The poem sets up a sharp contrast between nights and days. The nights are "glory," and the speaker dances through heaven, while the days are full of pain. That suggests the speaker was already struggling before this person appeared, and the relationship was a kind of escape.
The final stanza is where the feeling lands. After the loved one leaves, the speaker sees that this person was "the one who kept me sane." The mood is wistful and raw, moving from wonder to loss to a quiet, painful realisation. The simple rhymes and short lines make it feel like a confession said plainly.