The narrator is visiting a patient in a mental hospital and sits chewing his sandwich. He has also brought a sandwich for the patient (his brother? father? friend?), but the patient just holds his sandwich motionless in front of his mouth. The narrator tries to accept this as ordinary; he keeps chewing. But his "past is sitting in front of" him, trying unsuccessfully "to bring the present to its mouth."
The poet expresses his love for his own coffin. In fact, he is already in the coffin. He urges the reader to see his coffin as a bench for his friends to sit on, or as a coffee table. Though it would be “so much simpler, less gruesome / to use an actual coffee table . . . or a real bench,” that would show us to be rigid: “We must make one thing / do for another.” He urges the reader to use his “pine box,” to take it home, to make it a “conversation piece.”