Poseidon said: "frogs in the well can't talk about the sea with them because they are limited by the place where they live;" For insects that only live in summer, you can't talk about ice and snow with them, because it is limited by the survival season; People with shallow knowledge should not argue with him, because his vision is bound by his education. Now that you have come out from the river bank and seen the sea, you will know your shallowness and you can participate in talking about the avenue. Nothing in the world is wider than the sea. Thousands of rivers flow into the sea. I don't know when it will stop, but the sea will never overflow. The seawater is discharged from the tail stream, although it never stops, but the seawater does not reduce the reflux; Sea water does not increase or decrease due to seasonal changes, nor is it affected by floods and droughts. This shows that the sea far exceeds the flow of rivers and cannot be calculated with measuring instruments. But I have never been complacent, thinking that I inherited the body of heaven and earth and the qi of yin and yang. I exist between heaven and earth, just like a small stone or sawdust in the mountains. I just feel that my existence is really small. Why should I be complacent? Think about it, the four seas exist between heaven and earth, isn't it just like a small ant nest in the wilderness? Think again, the land of the Central Plains exists in the four seas, isn't it just like tiny grains of rice in a big granary? The number of things is ten thousand, and man is just one of all things; People gather in Kyushu, and the grain is long, and everyone is just one of many people; Compared with everything, isn't a person like a hair on a horse? What the five emperors succeeded, what the three kings fought for, what the benevolent people worried about and what the talented people planned were all in this tiny place! Boyi resigned himself to his fate and achieved great success, while Kong Qiu and Kan Kan talked about it and learned a lot, which is probably their complacency and pride; Isn't it like you are complacent when the river surges? "