surreptitious
The Chinese idiom, Pinyin is sh é NGU ǐ B ù C è, which means that gods and ghosts can't speculate. It's also called "gods and ghosts are unpredictable". From Yiyin Gengshen.
The origin of Idioms
The third part of Yiyin Gengshen written by Zheng Guangzu of the Yuan Dynasty: "the wise men show the unexpected opportunities, develop the teachers of a journey, and assist the young master to achieve great things."
Idiom usage
As a predicate or attribute; used of things, etc. Example: the first fold of Yuan Wumingshi's shooting liuchuiwan: "if we talk about the book of war in my belly, we have the chance to catch mice and cats."
surreptitious
a vast territory with a large population - guǎng tǔ zhòng mín
one 's favour as high as the sky and thick as the earth - dài tiān lǚ dì