This sentence comes from Comrade Mao Zedong's "Man Jiang Hong? and Comrade Guo Moruo" (January 9, 1963)
In this small world, there are a few flies hitting the wall. Buzzing, a few screams, a few sobs.
It is not easy for ants to exaggerate the country because of the locust tree, but it is not easy for the earthworm to shake the tree. In the west wind, fallen leaves are falling in Chang'an, and dysprosium is flying in the air.
So many things are always urgent; the world is changing and time is running out.
Ten thousand years is too long, seize the day.
The four seas are churning with angry clouds and water, and the five continents are shaking with wind and thunder.
Wipe out all pests and make them invincible.
Among them: "The four seas are churning with clouds and water, and the five continents are shaking with wind and thunder" means that the world situation is changing and the struggle against U.S. imperialism and Soviet revisionism is surging around the world.