Two short lines carry a lot here. The speaker describes their heart as a "half moon," and the title, "Phases II," backs up the idea: a moon doesn't jump from dark to full, it moves through stages. A half moon is in the middle of that cycle, neither empty nor complete.
That image seems to say something about heartbreak or hurt. The speaker feels partly whole, partly still wounded, and they aren't pretending otherwise. What stands out is the word "knows." The heart isn't desperate to be fixed or angry about the pain. It has accepted that "healing takes time," the way you accept that the moon will wax again.
The mood is quiet, calm and gently hopeful. There's sadness in the unfinished feeling, but also patience and trust that the fuller light is coming. The brevity of the poem adds to this, leaving space around the words, like a pause to breathe.