Delirium is a short, bleak poem about feeling shut in by your own despair. The speaker pictures themselves living inside walls of snow, a place that is cold, closed off and strangely empty. They don't know where to begin, which suggests a sense of being stuck, unable to find a way out or even a first step.
The second stanza piles up colours that don't quite fit together: grey like steel, purple like the sky. The mix feels unsettled, as if the speaker's view of the world is off-balance. Then comes the plain admission that feeling anything at all makes them want to cry.
In the last stanza, the pain turns inward. Voices inside the speaker scream silently, so the distress is intense but unheard. Death is all they see, and dreaming feels out of reach. (The poem spells it "affort," which is probably a typo for "afford.") The mood is heavy, cold and hopeless, and the short, simple lines make it feel raw and direct.