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.
“It is demonstrably true that things cannot be other than as they are. For, everything having been made for a purpose, everything is necessarily for the best purpose.” — Professor Pangloss
‘You must have a vast and magnificent estate,’ said Candide to the turk.
‘I have only twenty acres,’ replied the old man; ‘I and my children cultivate them; and our labour preserves us from three great evils: weariness, vice, and want.’
Candide, on his way home, reflected deeply on what the old man had said. ‘This honest Turk,’ he said to Pangloss and Martin, ‘seems to be in a far better place than kings…. I also know,’ said Candide, ‘that we must cultivate our garden.’