The basic desire to be a leader arises in people who are suffering from an inferiority complex. It does not matter whether they move into the political world or into the religious world; the will-to-power is an absolute indication that the man feels himself inferior to others and he wants to prove to the world that it is not so.
It is not only a question of proving to the world; through the world he wants to prove it to himself too, that he is not inferior to anybody. The only way mind can manage it is to make everybody inferior to you.
From Darkness to Light, chapter 5