God knows it, but man
It is a Chinese word, which means to really understand the mystery of something lies in everyone's understanding.
source
In the book of changes, it is said that "if the discipline is cut, the change will exist; if the action is pushed, the communication will exist; if the spirit is clear, the person will exist."
Examples
The 57th chapter of Li Baojia's officialdom in the Qing Dynasty: "I'll pay attention to it at any time and learn it slowly."
God knows it, but man
be extremely cruel and merciless - xīn hěn shǒu là
purify the heart and do away with cares - zhāi xīn dí lǜ