
Things control you when you are identified with them. For example, if you are really, really identified with your wife, your wife controls you [husbands too!]. If you are really identified with your money, your money controls you. If you are really identified with your hatreds, your actions, your emotions, your mind, they always control you because you are them. And because they are always in agitation, you are in turmoil. You are not an independent source of light, of control, an independent unit of consciousness.
People think this is not important because they are so identified with their not-self. Not-self means your body, your emotions, your possessions, your mind, your thoughts, your ideas. They are not you, but because you are identified with them, you think that it is very painful to detach yourself from your not-self and watch it and observe it.
Once you start observing your not-self, you feel joyful, independent, free, powerful. It is not easy to do that, but the whole Teaching is based on observation. The whole Teaching is a progressive development of going toward your Real Self and becoming your True Self. This is the whole purpose of the Teaching.