 Alexander later went on to conquer or king of Asia as far as the Indus and the Oxus, thus fulfilling the prophecy.The knot may have been a religious knot-cipher guarded by Gordian/Midas' priests and priestesses.Robert Graves suggested that it may have symbolised the ineffable name of Dionysus that, knotted like a cipher, would have been passed on through generations of priests and revealed only to the kings of Phrygia.