Delusion isn’t being mistaken about something; the earth being flat, or there being penguins at the North Pole: it is taking experience and using it in creating and maintaining a sense of Self.
Often we experience this as a kind of incessant inner conversation. Whilst we might want it to stop, this too is Self-ing.
We change when we experience it as energetic noise, feeling it in the body. When we experience noise, we can experience silence. When we experience silence, we can experience vast space.