Then the mind is using you. You are unconsciously identified with it, so you don't even know that you are its slave. It's almost as if you were possessed without knowing it, and so you take the possessing entity to be yourself. The beginning of freedom is the realization that you are not the possessing entity - the thinker. Knowing this enables you to observe the entity. The moment you start watching the thinker, a higher level of consciousness becomes activated.