Catharsis

Catharsis is from the Ancient Greek word κάθαρσις, katharsis, meaning "purification" or "cleansing".

It is most commonly used today to refer to the purification and purgation of thoughts and emotions by way of expressing them. The desired result is an emotional state of renewal and restoration.^[1][2]

In dramaturgy, the term usually refers to arousing negative emotion in an audience, which then expels it, making them feel happier.^[3]

In Greek the term originally had a physical meaning only. This began with its use to describe purification practices. The first recorded uses of the term being used in the mental sense was by Aristotle in the Politics and Poetics, comparing the effects of music and tragedy on the mind of a spectator to the effect of catharsis on the body.^[4][5]

The term is additionally used in Greek to refer to the spiritual purging process that occurs in the Christian Purgatory. Greek Neoplatonists also used the term to refer to spiritual purification.

Catharism was a term used by outsiders to describe the thinking of a Christian movement so named because of its interest in purity.

In psychology, the term is associated with Freudian psychoanalysis where it specifically relates to the expression of buried trauma (the cause of a neurosis), bringing it into consciousness and releasing it, increasing happiness.

The term also has uses relating to the physical body. In medicine, it can refer to the evacuation of the catamenia ("monthlies", menstrual fluid) from someone. Similarly, a cathartic is a substance that accelerates the defecation of faeces.