Actually, from his writing style, the quote does not look like the original translation, or even taking out of anything he wrote. At best, it is just a generalized quote of theory behind Pai-chang Huai-hai's writing.
he's believe is all existence is good by nature. As long as you stay away from desire, then you are not far from being buddha.
At age 80, his follower one day secretly hide his farm tools, hoping he would rest. As a result, he refused to eat that day, cause he did not do work. This is claim to be his greatest influence to buddism, by pushing monks to work rather then just beg for food.
regarding the "rule" you mentioned. due to increase of students and followers, temples need rule and regulation. hence he wrote it. it was lost in Song dynasty, and rewrote in Yuan dynasty.