"Hell is empty and all the devils are here"

This quote from William Shakespeare's play The Tempest is a cautioning about the presence of evil in the world. It suggests that the world is full of wickedness which the devil is all over. The quote implies that the world is a dangerous place and that people must watch out for the evil that prowls around them. It likewise recommends that the devil is not restricted to a single place, such as hell, but is instead present in all aspects of life. The quote serves as a suggestion that individuals need to know the capacity for evil and take steps to protect themselves from it. It also serves as a warning that the devil is constantly present and that people need to be alert in their efforts to protect themselves from it.