As soon as we are born, we start getting ego. we are taught to survive on ego and ego thrives on us. It becomes superior than everything else. We all grow up with a mental conditioning of ego. This belongs to me, this is m house and i should be safe. if we do mistake, we are unable to accept the mistake even when we know we have done a mistake, why. In a fight we want to have an upper hand why? We goto any extent to prove our point why? We want to prove we have bigger house or car why? everywhere it is ego. If it is constructive, it is fine but how can it be constructive, it would always lead to destruction. We cannot control ego, we cannot have ego but we can be aware of our ego. we all know ego is bad and if someone else comes and tells us that this is ego, then the ego gets defensive and it starts feeding us with negative thoughts against that person itself, ego at work here. however, if we decide to control ego, the only way is to be aware of ego. watch your thoughts, why you are doing what you are doing, why did you Say, if you said something, is it because of ego or this is what real you think you should have said and if you should apologize to someone for same. If you do not have the clarity, write down everything and watch over. analyse own thoughts. once you start becoming aware, every time there is some ego, your mind would send you an alert that this is your ego. as the level of awareness would start increasing, your ego would start reducing. be aware of your ego to reduce it or else it can never be controlled.