Here, a speaker describes being consumed by despair while feeling emotionally numb. The central image is a paradox: a "frozen vessel," which seems to stand for the speaker's body or soul, is engulfed by fire. Yet the ice keeps the flames "distant," so the destruction happens without the speaker really feeling it. The phrase "So distant. So unfazed." comes back at the end, suggesting nothing has changed.
The speaker watches a life crumble, including anything that once brought happiness, which is now only "a shadow of the past." The heart pounds and begs for release, but there's no relief. The "black fire" can't be put out by tears, and it isn't warm enough to thaw the ice either, which captures the trap of being hurt and numb at once.
The mood is bleak, heavy, and eerily quiet. By the end the fire is gone, only ashes remain, and the vessel survives in a kind of empty aftermath.