The definition is that there is a difference between incorruptible people and corrupt people. It means the same as "those who sink sink, those who float".
Source: The Book of Songs Li Feng: Wei Turbidity Mao Chuan: "Jing Wei enters each other, clear and turbid. 」
This allusion comes from Qu Yuan's The Fisherman.
The full text is as follows:
Qu Yuan, who was once released, swam in the river beach and sang on the bank of Zehe River, with a haggard color and a haggard description. When the fisherman saw this, he asked, "Isn't this son Dr. San Lv's?" Why? " Qu Yuan said, "The world is cloudy, and I am alone. Everyone is drunk, I wake up alone, I can see. "
The fisherman said, "A saint is not obsessed with things, but can keep pace with the times. The world is muddy, why not spit its mud and make waves? Everyone is drunk, why not feed the bad ones? Why think deeply and hold high, and let yourself become? "
Qu yuan said: "I heard that the new bather plays the crown and the new bather shakes his clothes;" Ann can observe with her own body, but what about the person who collects things? I'd rather go to Xiangliu and be buried in the belly of a river fish. Can Ann be white and covered with secular dust? "
The fisherman smiled and walked away with the drum, but he sang: "The water in the rough waves is clear, you can hold my tassel;" The water in the rough waves is turbid, so you can lick my feet. "Then go, no longer use words.