It means:

1. There is no devil in the world. What is really evil is the heart of some people. They live in this world with ordinary people, or they are ordinary people. (emphasizing the existence of "people", "land? Prison "does not exist)

So many wicked people in the world, such as demons in hell, have been released. Emphasize the existence of "hell", but the devil has all gone to the world.

The wicked are like the devil, evil but powerful, dominating the world and so on.

Source:

From Shakespeare's play The Tempest, Act I, Scene II: Hell is empty, and all the demons are here.

Ai Lier Ai Lier, the elf, reported to Prospero, the master, that the boat had capsized according to the master's wishes.

There is no one who is not crazy and does not engage in desperate activities. Everyone escaped from the burning ship and jumped into the dark sea except the sailors. Prince Ferdinand's hair turned into seaweed. He was the first to jump into the water and shout: Hell has opened and all the demons have come out.