The eight-character couplet written by Lin Zexu, a national hero in the late Qing Dynasty, in his study room: "The sea embraces all rivers, and tolerance is great; standing on a wall of thousands of feet, without desire is strong." The original intention is to metaphorize a broad mind like the sea. This describes the extraordinary magnanimity of people based on the infinite capacity of the sea that can accommodate countless rivers and streams.
"The sea is open to all rivers and is big", which means to be open-minded and broad-minded, which is also a sign of a person's self-cultivation. There used to be a saying in China that "the prime minister's belly can make a boat sail." Regardless of whether those prime ministers are all broad-minded people, people regard those who have a broad mind as broad as the sea as respectable people.
There is a saying in the Analects of Confucius called "Without desires, one must be strong", which means that if a person has no desires, he has nothing to fear and has nothing to fear.