The primary thing when you take a sword in your hands is your intention to cut the enemy, whatever the means. Whenever you parry, hit, spring, strike or touch the enemy’s cutting sword, you must cut the enemy in the same movement. It is essential to attain this. If you think only of hitting, springing, striking or touching the enemy, you will not be able actually to cut him.
The McNamara fallacy, named for Robert McNamara, the US Secretary of Defense from 1961 to 1968, involves making a decision based solely on quantitative observations (or metrics) and ignoring all others. The reason given is often that these other observations cannot be proven.
The fallacy refers to McNamara's belief as to what led the United States to defeat in the Vietnam War—specifically, his quantification of success in the war (e.g., in terms of enemy body count), ignoring other variables.
A pattern which prevents us from resolving our conflicting forces leaves us almost perpetually in a state of tension.
For, if we live in a world where work is separated from family life, or where courtyards turn us away, or where windows are merely holes in the wall, we experience the stress of these inner and conflicting forces constantly. We can never come to rest. We are living then, in a world so made, so patterned, that we cannot, by any stratagem, defeat the tension, solve the problem, or resolve the conflict. In this kind of world the conflicts do not go away. They stay within us, nagging, tense…The build-up of stress, however minor, stays within us. We live in a state of heightened alertness, higher stress, more adrenaline, all the time.