Rui had many uncertainties. If the Martial Mind was simply the part of the mind that was untapped, then why did Master Reina say that it didn't exist? Why did she say that he needed to create it?
That didn't make sense. Which meant his understanding was lacking.
Of course, he recognized that she was enjoying his frustration. He had grown accustomed to it over the past eighteen months.
"Alright, stop glaring at me like that. I'll explain." She laughed, before her demeanor grew more serious. "You have a deep understanding of the brain and mind, yet let us visit it once more. The brain and mind are not synonymous, though they are deeply intertwined. The brain is a vessel for the mind, while the mind is like water that fills the vessel. Now, what if I told you that there was an adjacent compartment of the vessel that was not filled with any water? What if I told you that this compartment of the vessel was empty?"