I want to move to the point of saying that if this instinct is not harnessed, it becomes a very dangerous, pernicious instinct. For instance, if it isn't harnessed, it causes one's personality to become distorted. I guess that's the most damaging aspect of it: what it does to the personality. If it isn't harnessed, you will end up day in and day out trying to deal with your ego problem by boasting.