The pain-body wants to survive, just like every other entity in existence, and it can only survive if it gets you to unconsciously identify with it. It can then rise up, take you over, "become you," and live through you. It needs to get its "food" through you. It will feed on any experience that resonates with its own kind of energy, anything that creates further pain in whatever form: anger, destructiveness, hatred, grief, emotional drama, violence, and even illness. So the pain-body, when it has taken you over, will create a situation in your life that reflects back its own energy frequency for it to feed on. Pain can only feed on pain. Pain cannot feed on joy. It finds it quite indigestible. Once the pain-body has taken you over, you want more pain. You become a victim or a perpetrator. You want to inflict pain, or you want to suffer pain, or both. There isn't really much difference between the two. You are not conscious of this, of course, and will vehemently claim that you do not want pain. But look closely and you will find that your thinking and behavior are designed to keep the pain going, for yourself and others. If you were truly conscious of it, the pattern would dissolve, for to want more pain is insanity, and nobody is consciously insane.
— Eckhart Tolle