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 special contribution of Zen to Eastern thought was its recognition of the mundane as of equal importance with the spiritual. It held that in the great relation of things there was no distinction of small and great, an atom possessing equal possibilities with the universe. The seeker for perfection must discover in his own life the refection of the inner light. The organization of the Zen monastery was very significant of this point of view. To every member, except the abbot, was assigned some special work in the caretaking of the monastery, and curiously enough, to the novices was committed the lighter duties, while to the most respected and advanced monks were given the more irksome and menial tasks. Such services formed a part of the Zen discipline and every least action must be done absolutely perfectly. Thus many a weighty discussion ensued while weeding the garden, paring a turnip, or serving tea. The whole ideal of Teaism is a result of this Zen conception of greatness in the smallest incidents of life. Taoism furnished the basis for aesthetic ideals, Zennism made them practical.