he stumbles upon a mystery, where the Grail King is old and sick and has a wound which will not heal, and the kingdom is a wasteland. Here is an image of the failed life force
Greene argues that the Grail King embodies the archetype of failed or wounded life-force — particularly the absent or diminished father-principle — whose redemption depends on the hero’s achieved compassion and identification.
, The Luminaries: The Psychology of the Sun and Moon in the Horoscope, 1992thesis