Ego means physical self or limiting the consciousness[innermost self ] to
the physical body. Every action is associated with a series of thought
processes within the waking experience. But the point is, the ego, while being
involved in this action does not get into other thoughts which are unrelated to
this action. If one leaves the ego to itself it will wander aimlessly
over things totally unrelated to each other. This dissipation of the ego does
not occur when one focuses it into one action. While doing that action it
dwells on only those things which are related to the main action. To
this extent action itself disciplines the ego. Of course it may not be a
complete discipline. But in some sense there is mostly a uni-directional
restriction or piloting of the ego. The whole human experience is based on the
ego. The ego cannot be destroyed by action and conduct and deeds.
One has to understand the fact that,
the ego, physical body and the world exists together. If one of these is missing the duality is impossible to experience. Thus it is no use of struggling to overcome only the
ego. All other teachings propagate to overcome the ego to get self-knowledge. There is no use of struggling to overcome the ego. It is
impossible to overcome the ego with the ego. Ego physical body and the universe are one in essence. That essence is consciousness. consciousness is the innermost self and ultimate truth or Brahman. Only by proper and perfect understanding of the mind, it is possible to overcome duality.