Incubus: the medieval nightmare disease

de bene esse: literally, of well-being, morally acceptable but subject to future validation or exception

http://www.medievalists.net/2014/01/03/incubus-the-medieval-nightmare-disease/

Incubus: the medieval nightmare disease - Medievalists.net

medievalists.net

Some people have nightmares of being crushed to death, either by a person or a thing. In the Middle Ages this type of dream was so common that had it a name: incubus (which means 'the crusher' in Latin).