Know by the slightest
The idiom, pronounced y ǐ w ē izh ī zh ù, is interpreted as micro: tiny; zhe: remarkable. From the appearance of things, we can infer its development trend or its essence.
It comes from Su Xun's on distinguishing traitors in Song Dynasty: "only those who are quiet in the world can see and know."
Know by the slightest
Concealing evil and promoting good - yǎn è yáng shàn
one log cannot prop up a tottering building - dú mù nán zhī
beautiful days and nights with moon and flowers - huā zhāo yuè xī