Harken back to the idea that the eyes are directed to the object being sought. That same thing occurs for everything else. On some deeper level than the surface, it is known where that being sought can be found, and this apples to everything we are seeking, anything from misplaced spectacles to the fulfillment of our dreams
The body, at least that of it which is not preprogrammed and automatic, is the tool that the mind uses to get what it desires. In the body, the brain is the major tool used by the mind, and the only constraints are the inherent intelligence and its physical condition. All of the other features and capabilities of the body are available as well.
One of the many functions of the brain is reasoning, with which it can bring to the mind the many possibilities that exist for any thread of thought, from which then the mind can then decide what to do. Reasoning can take the form of logic, mathematics, intuition, fact-finding through research, experience, and probably other forms that aren't readily apparent.
The brain is physical and of the material world, the mind is of the immaterial world. It is the motivator that our core being uses to achieve his objectives, one of which is executing the divine plan, the definition of which we are not aware. One possibility is one of my aphorisms, "Making the difference with a kind word, a good question, a helping hand, we deliver." What we deliver is not specified. And another, "Working harmoniously with core-being, he and we achieve our objectives. The rub here is we don't have much insight into core-being's goals. Nor can we divine them from looking at what actions were taken; we just don't know.
If the mind is connected to the core-being, and is used to realize the divine plan, and if the body has capabilities that can be used in a variety of ways, and if all the available capability of the body is not being applied all the time in pursuit of the divine plan, then the "idle" capabilities can be used by the being in accomplishing his dreams, as long as they are compatible with what the core-being is doing in pursuing the divine plan.
Therefore, if the being can dream, i.e., decide with what he wants to be involved, all of the power of the mind is, at times, available to him. This underscores the wisdom in one of he Stoic decision making rules, "decide what you want to be, not what you want to have." The mind can work it out to achieve whatever.
This may be the reward for working harmoniously with core-being. The punishment for rejecting same is physical and psychological deterioration. It is also an incentive for ideological and nourishment of the brain, with the right foods and the right thoughts.