"Silent pain" is about suffering that someone feels they must keep hidden. The speaker talks directly to "you," almost like a whisper in the ear, and the advice is all the same: be quiet, keep still, don't let anyone hear. Yet the voice isn't comforting. It sounds like an inner critic, or a habit of self-silencing, repeating that speaking up is dangerous.
The poem suggests a deep distrust of help. Offers of care from "she" or "he" are treated as lies, so the speaker would rather lock the pain away "behind a door" than risk being let down. Words like "demons," "screams" and "the blind" show how intense the pain is, even though nothing is said aloud.
The repeated words, like "silent," "quiet" and "hide," make the poem feel tight and claustrophobic. The mood is bleak and lonely, and the ending, where the pain will go "to the grave," is especially heavy. It leaves the reader worried about someone who sees no way out.