At a certain point we need to grow up; we need to look inside ourselves for our inner guidance. There are things most human beings know; they just don't want to know them. They know deep down that certain things in their lives are working or aren't working, that certain parts of their lives are functional and others are dysfunctional. But sometimes, as human beings, we don't want to know what's not convenient. So we pretend not to know.
Ego is the movement of the mind toward objects of perception in the form of grasping, and away from objects in the form of aversion. This fundamentally is all the ego is. This movement of grasping and aversion gives rise to a sense of a separate 'me,' and in turn the sense of 'me' strengthens itself this way.