God knows, god knows, I know, my son knows, what is the purpose of this sentence?

The purpose of this sentence is to refuse to accept gifts. Someone gave Yang Zhen a gift, but Yang Zhen refused. The other party said that no one knew. Yang Zhen said these words, meaning don't do bad things, do bad things, don't think that no one knows, and let people know unless you can't do it yourself.

Yang Zhen was an honest and strong official, and repeatedly spoke out about the disadvantages of current politics, which was deeply hated by Fan Feng, a regular servant. "God knows, God knows, I know, I know!" The eternal story has become the common language for future officials to be honest and clean. "Heaven knows the earth, I know my son" was first said by Yang Zhen, a native of the Han Dynasty. He said this in order to refuse to accept a gift.

Extended data

Story:

In the Han Dynasty, Yang Zhen went to Donglai as a satrap and passed by Changyi, the magistrate of Changyi, which he had recommended before. Wang Mi brought ten catties of gold to Yang Zhen in the evening. Yang Zhen was very angry and said, "I know you, but you don't know me."

Wang Mi said: "It's getting dark, and no one knows." Yang Zhen said, "Heaven knows, earth knows, I know, and you know. How can you say that no one knows? " Therefore, later generations called it "the four knowledge satrap". The purpose of this sentence is to refuse to accept gifts.