We hide our anxiety and insecurity under an inflated, unrealistic mask. The inflated ego is a great enemy of our inner growth. It distorts our perceptions and colors our relations to the world. The development of the personal soul is only the beginning of the process of being fully human. The development of compassion and the awakening of the heart is also necessary.
Many human beings are intelligent, but have little or no compassion.
Mass murderers and sadists are human, but there is something critical lacking in them. They have no heart. At a less extreme level, many people have an overdeveloped, inflated ego and an underdeveloped heart. The humanity of such people becomes stunted when the personal soul dominates and overshadows the functioning of the human soul. According to the Sufis, the human soul is located in the heart.