ἀκηδία

Akēdía is Greek, from the prefix a- (without) and kēdos (care, concern). The literal meaning is carelessness or indifference. In secular Greek, the word described a mild emotional state — not caring about what happens. But Evagrius Ponticus, a fourth-century monk writing in the Egyptian desert, transformed it into something more precise and more frightening. For Evagrius, acedia was the demon of the early afternoon, the one that made a monk stare at the wall and wonder why he had ever come to the desert at all.

Evagrius listed acedia as one of eight logismoi, or evil thoughts, that afflicted monks. John Cassian carried the concept from Egypt to southern Gaul around 420 CE, translating the Greek list into Latin. When Pope Gregory I condensed Cassian's eight vices into seven deadly sins in 590 CE, he merged acedia with tristitia (sadness) and called the result sloth. The merger obscured the original meaning. Sloth is about not doing. Acedia is about not caring.

Thomas Aquinas, writing in the thirteenth century, tried to recover the distinction. He described acedia as 'sorrow about spiritual good' — a disgust with the divine that manifests as restlessness, boredom, and an inability to stay in one place. Aquinas understood that acedia was not laziness. A person with acedia might be frantically busy, filling every hour with activity to avoid the emptiness at the center. The monk who reorganizes his cell for the third time in a day has acedia. The monk who sleeps has sloth.

The word almost disappeared from English after the Reformation. It survived in theological dictionaries and monastic rules but was largely unknown to general readers until the twentieth century, when writers like Aldous Huxley and later Kathleen Norris recovered it. Norris's 1999 book Acedia and Me brought the word back into popular vocabulary. The medieval demon of the afternoon turned out to describe something modern people recognized immediately.