
What is EGO actually?
Essentially EGO equals your self-image and it is the you who you think you are.
Take a simple example. If your friend calls you a stupid person for believing in that story, you get displeased, aren't you. Why? Because it's a challenge to your self-image and your ego tells you you are not stupid, so you get unhappy!
Hence, Marie Callas is smart enough to say EGO is your Siamese Twins that is constantly drawing your attention, chiding you, making fun of you and ultimately, making you to perceive yourself to be better than someone else.
So is EGO bad?
I feel a bit is ego is beneficial to the self-esteem but too much of it will ruin you socially and spiritually. People will begin to steer clear of you and those who are around you are only with you because they have some benefits to gain off you.
Marie Callas says the only way is to disallow your ego from hitting the roof is to stop feeding it with more nourishment. I will remember her wise teaching.