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As far as the ego is concerned, as earthly creatures, we need egos, we can't live without them. Ego is simply our sense of our individual identity, a sense of who we are in this world. We cannot belong to earth and not to have some kind of ego. Ego is kind of a mental image of who we think/feel we are. As earthly creatures, we are connected to the physical world of form and our mental image of who we are a.k.a ego is also connected to our physical form, our physical environment, the people and the objects in our life who are also presented in a physical form, to the events that take place in real time and space.