"Well, if you are confused, I'll make it simple for your brain to understand." Rass took a large bite of the meat before him and munched it aloud before speaking, "After running for some time, do you feel tired?"
"Yes," The subordinate nodded in response.
"Once you rest after eating something, you'll have enough energy to run once again, right?" Rass said, continuing upon seeing his subordinate nod, "There is a type of energy in our body that is needed for us to function. For our body to move, for our minds to think, etc. there is an energy."
He pointed at the meat before him, "Simply put, when I eat this meat and digest it, my body converts it into a reservoir of energy. They are carbohydrates and fats. When our body needs to move, these reservoirs are broken down and converted into the energy that we consume to move."
"And that, you can consider as Qi." Rass said, "Normally, there is a limit to how much a body can store fats and carbohydrates."