At first, "Depressed" sounds like someone giving advice: forgive, forget, endure the pain. But the voice slowly turns darker. It isn't a friend. It says "let me watch your suffering" and tells the listener they are alone and hopeless without it. The poem reads like depression itself speaking, or an inner voice that feeds on despair and presents it as calm acceptance.
The cheerful-sounding lines, like enjoying "even the rain," feel hollow because they sit beside orders not to complain or cry out. The repeated "forgive and forget" becomes less like healing and more like a trap, a way of burying pain instead of facing it.
In the last stanza the voice announces it will "takeover" and become the person the listener never could be. Its promise to make them "shine" or "fall" is chilling, since it admits it doesn't care which. The mood is bleak, controlling, and uneasy, with a sense of a person losing hold of themselves.