The mean manager knows he has lost his intimate vitality, his personal energy.
He rages against his subordinates. He loves to plot against people and make them suffer. Deep down he is envious and jealous of others- above all whole, simple and vital people, because they remind him of what he once was.
Often when one obtains power, like a much yearned for command post, that person’s personal and spiritual growth journey stops. There is a detachment from the great moral values. Little by little the person loses strength, energy and vitality.
You could say that a mean person is a person without true strength, without vitality.