Ego is the thinking mind, the individual mind. It's a way of experiencing separation from the oneness of all that is. It's a way of upholding a false sense of self. Ego can be described as 'the one who makes us believe we are a someone'. But actually it's a collection of thoughts which is just happening, and if consistently believed and interacted with it can create the idea of 'who we are'. This is the perceptional error which we start looking at in this work, who am I, without these thoughts? Who am I, after thoughts have stopped, and before the next one comes? Try playing with this! What else is here beyond thought? What is here, that cannot be described by the mind?