The Grail's Manifestation in and relationship to the earthly realms is dependent upon its Guardian, or Grail King. This function was fulfilled by a line of Grail Guardians, drawn from one family usually that of Joseph of Arimathea. It succeeds to Arthur's knights who are successful Grail Knights, Perceval and Galahad. It follows that those who find the Grail become its Guardians. The early Grail Kings include Bran the Blessed, Pellam, Anfortas and Brons. In Welsh tradition, this role is assigned to Manawyddan and Pryderi. Each Guardian or King is wounded: his mortality sits heavy upon him since he has tasted immortal things. When he passes on the role to his successor, he himself passes within to the Blessed Realms.
Third Letter Amata
Raha'u'llah
"If the mystic knowers be of those who have reached to the beauty of the Beloved One (Mahbub), this station is the apex of consciousness and the secret of divine guidance. This is the center of the mystery: "He doeth what He willeth, ordaineth what he pleaseth. Were all the denizens of earth and heaven to unravel this shining allusion, this darksome riddle, until the Day when the Trumpet soundeth, yet they would fail to comprehend even a letter there of, for his is the station of God's immutable decree, His foreordained mystery... Who so knoweth this secret will assuredly hide it, and were he to reveal but its faintest trace they would nail him to the cross." Baha'u'llah, The Fourth Valley