Acharya Prashant explains that true quietness, silence, and thoughtlessness are not mental concepts or thoughts. If one is thinking about being quiet or healthy, it is proof that they are not actually in that state. He emphasizes that seeking self-validation or a certificate of realization is a trap of the ego. Real quietness is so simple that it can only be recognized when it is lost; while one has it, they must be oblivious to it. The moment a person declares they are quiet, they have already lost that state because their definition of knowing is limited to thought.