Looking At The Enemy
Look at the enemy as if you are looking through him without being too obvious about it. Perception and sight are two important principles in my strategy. Perception relies on intuition. This is developed through practice. Sight is based upon the physical ability to use the eyes. Understand the difference and sameness of perception and sight. One must be prepared for the possibility of losing one’s sight in mortal combat.
— Stephen F. Kaufman, The Martial Artist’s Book of Five Rings, pp. 28-29