It is a case of the balance of ecology in the world, and people are discovering more about it nowadays. So we need certain parasites. We call them parasites, maybe in our body, like germs that are good and others that are not. Perhaps there is a balance between them, or perhaps there are too many. I spoke to you of that man who was controlling all these monsters. Well, the human will has the ability to control the minds of these beings. If you can do it you can heal yourself. And you can heal others. It takes a lot of power, of course. As we said before, the whole purpose of life is mastery. You have to become a master of all conditions.