You have a narrative in your head; everyone has one. It is the “things” you think about. Most of the time, the narrative wanders. When you must complete a task, your brain (physical mind resource) usually focuses on the sequence of events that the task requires. Other than that, the narrative is in its natural state - wandering without intent – jumping unfettered from one thought, one problem, and one image to another. Sometimes, you don’t have any sequence of grammatically connected words (a narrative) – you have images – you intentionally picture some person or event in your past or possibility in the future.
Cerebral activity can be experienced while you are sitting or moving. It is possible to control the direction, subject, and imagery purposefully. When the narrative and its associated images are purposeful, we call this thinking. Thinking can be associated with well-known tasks or activities or thinking may be the systematic application of logic and reasoning to an unknown – consciously trying to solve a problem that you want to solve.