From the 5th Chapter "The Five Officials" in Cultivating Chi by the samurai physician Kaibara Ekiken:
"The ear, eye, mouth, nose, and body are in charge of their respective duties of hearing, seeing, speaking, smelling, and moving, and so are called the Five Officials.
The mind is the master of the Five Officials. It is in charge of thought and is called the Heavenly Lord. From within, the mind manages the Five Officials. It should think deeply and correct their good and evil. Because of the Heavenly Lord, the use of the Five Officials is enlightened, and it would be unnatural for the Five Officials to use the Heavenly Lord.
If the mind is the master of the body, you will be at ease and without trouble. Then the Five Officials will receive their orders from the Heavenly Lord, take care of their respective duties, and not simply act as they please."
Karate-do, Judo, Kobudo, Iaido