ego (n.)
1714, as a term in metaphysics, "the self; that which feels, acts, or thinks," from Latin ego
To me, ego means "no space" (from identification) - man's greatest enemy.
I submit that you've only seen infants who's "I" was centered in essence, that is, what they bring into existence with them, partially as a function of the impressions from stars and other planets.
Gradually with socialization, acculturation, "education" and, with other impressions which the organism is exposed to, a (false) personality is built up surrounding the essence and, usually by the age of 7-10, the "I" is centered in this (false) personality, that which he acquires in life.
A man (potential) has become a man-machine, an automaton a slave to incoming impressions and his own acquired functions, whose destiny is to become food for the moon. Merely fulfilling a function in nature, never realizing he is a three-brained being and has very great possibilities.
This is your birthright which has been stolen from you.
In the grand cosmic scheme consisting of many octaves, he is but a part of a thin film of organic life on a plane(of existence) in a dark part of the universe transmitting and receiving impressions, a transmutation station, for the necessary growth of earth and its moon within its local branch of the cosmic ray of creation.
At this point, without necessary shocks and a great interest and effort, along with favorable conditions, necessary new knowledge (from outside of ordinary life), along with the right help, no further evolution of being is possible.
Man is as an acorn, which may become a tree. So a man may grow a soul.
A man must die in order to be born, so that he may live.