There is no entity by name of the mind. because of the emergence of thoughts, we surmise something from which they start. that we term ’ mind’—Maharishi Ramana.
Comment; According to Vedanta permanent is that thing which remains every time. So Observer in us remains every time. my Guru St.Nikka Singh Ji used to say that confirm it., ” you are not the body, you do not mind, but you are Observer, you can see in your Self that everything changes as mind, body, your senses but the observer never changed. during observation of the mind, your thoughts get emerge, ”