16. PREFACE - Bad Spirits are only found where they can satisfy their perversity. In order to turn them away it is not enough to ask them to go, nor even to order them to go. It is imperative that Man eliminates from within himself that which is attracting them. Bad Spirits discover the ulcers of the soul, the same way that flies discover those of the body. In this manner then, as you cleanse the wound in order to avoid maggots, cleanse also your soul of all its impurities so as to avoid bad Spirits. We live in a world which teems with these Spirits, so the good qualities in the heart do not always make them abandon their attempts on us. But nevertheless, these qualities give us strength to resist them.