Under its quiet surface, the poem is a plea for closeness. The speaker wants someone to feel their heartbeat and say they understand, even if the understanding isn't entirely real. The epigraph makes that clear: "Please pretend that you understand." It's an honest, slightly vulnerable request, since the speaker would settle for comfort over truth.
The imagery sets a mood of ache and uncertainty. The heart beats "against the hollow," as if there's an emptiness inside the chest for it to echo in. The day dies while giving way to tomorrow, and the "ghosts of what once was" hang over the future, so the past seems unable to let go. The repeated line about the heartbeat pulls the poem back to the body, to something immediate and physical. The ending, with its trailing ellipsis, leaves the request hanging, unanswered. The feeling is tender, lonely, and a little desperate, like someone reaching out in the dark and waiting to be met.