the famous claim that the function of tragedy is ‘through pity and fear to accomplish the katharsis of experiences of that kind’ does not appear to pick up on anything that has gone before… It is a strong prima facie advantage for an interpretation of katharsis if we can show that it, unlike the others, offers the desired retrospective link.
Nussbaum argues that neither the ‘moral purification’ nor the ‘medical purgation’ reading of katharsis successfully integrates with the rest of Aristotle’s Poetics, and that an adequate interpretation must demonstrate retrospective coherence with the work’s earlier discussions.
, The Fragility of Goodness: Luck and Ethics in Greek Tragedy and Philosophy, 1986thesis