(Buddhism) think on the power of Kannon

“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

all / together

furniture; fixture; equipment; implement; apparatus; tackle; gear; paraphernalia; instrument / tool; utensil; appliance; device / means; medium; measure / property; possession; belongings; goods / ingredient; material; substance; stuff / style; manner; way; means / things; articles; goods; food; work; element / reality; actuality; state of affairs

(literally) know the other side and yourself, a hundred battles will not be perilous