Heracles escaped the torment only by voluntarily consuming himself on a funeral pyre… ‘Lies in the choice of pyre or pyre— / To be redeemed from fire by fire.’
Edinger reads the pyre as the central calcinatio symbol: voluntary self-immolation is the only release from the ‘intolerable shirt of flame,’ making the pyre an image of redemptive psychological annihilation.
, Anatomy of the Psyche: Alchemical Symbolism in Psychotherapy, 1985thesis