Hell is empty, and the devil on earth comes from Shakespeare's The Tempest.

"Hell is empty, and all the demons are on earth"-Shakespeare's The Tempest. (Tempest) Act I, Scene II: Ai Lier, the elf, reports to his master Prospero. Literally, hell is empty because all the demons in it have come to earth. It means that the world is getting worse, and people are not old. It is more terrible for human beings to do anything unnatural for their own selfish desires than the devil.

The Tempest is a legendary play written by British playwright william shakespeare in his later period. It was written in about 1611, premiered at the end of 1611 and first published in 1623.

The play tells the story that Prospero, the Duke of Milan, was usurped by his younger brother Antonio, and fled to a desert island with his only child Miranda, and became the owner of the island by magic. Later, he created a storm, took the ships passing by the nearby King of Naples and Prince Ferdinand and Antonio and others to a desert island, and used magic to promote the marriage between the prince and Miranda. In the end, Prospero regained his title, forgave the enemy and returned home.