Ego is a physical entity within the waking or dream. T

Ego is a physical entity within the waking or dream. The ego, body and world exist together and disappear together along with waking or dream. When one thinks of the "ego" alone he is in the grip of duality. The formless witness knows the appearance and disappearance of the waking/dream as a whole, not ego alone. 

Trying to overcome the ego alone is impossible. One has to get rid of experience of duality, by mentally focusing the attention on the formless witness of the three states. The witnessed [three states] appears and disappears; the formless witness is never known to be appearing and disappearing. That which appears and disappears is not the permanent. –FORMLESS PATH