I would like to consider the words of Buddhadhassa Bhikkhu when he said that many people suffer mental disorders, but a much more common disease is a spiritual disease which goes by the name of ‘me’ or ‘mine’. Most of us, it seems, need to work to be healed from this illness.
What is it, then, that we usually refer to in this way? What is it that we call ‘ego’, ‘me’, or ‘mine’? Ego is the totality of what is classically called ‘afflictions’, the afflictions being attachment, aversion, and ignorance; ego is our deep habit for attachment, aversion and ignorance. In other words, ego is being attached to attachment, being attached to aversion, being attached to ignorance. Unless we taste real peace, we tend to be attached to desire. We see desire as having a value in itself, something energetic, as something which can for a while take us from our boredom and depression, etc.
Ego and Mindfulness, by Corrado Pensa