16-cell; regular hexadecachoron

“a hundred days of sermonizing, one fart” → a metaphor for how something that one has put great effort into can come to nothing after even a slight mistake, much as a hundred days of serious spiritual study can be lost to the winds

among the Thirty-Six Stratagems, nothing beats fleeing

(lit. one eye, two legs/feet, three courage, four power) "first, eyes, second, feet, third, courage, fourth, power". The essentials of [kendo] in descending order of importance

(literally) plan your day during the morning, plan your year during New Year's / early planning is the key to success