According to some accounts, it was while all the knights were thus seated around Arthur's board on this occasion, that the Holy Grail suddenly appeared in their midst, its radiance so veiled by its coverings that one and all vowed—when it had disappeared—never to rest until they had beheld it unveiled. Arthur, knowing this boon would be granted only to the absolutely pure and that they were all but one sinful men in various degrees, keenly regretted they should have made a vow which would entail a hopeless quest, and would at the same time leave him bereft of the very knights who had hitherto helped him to right the wrong and keep the pagans at bay. The knights hastened to church to receive a blessing before they departed, and then went off, singly or in small groups, to seek the Holy Grail.
When Galahad arrived at Arthur's court, he was fully armed, save that an empty scabbard hung by his side and that he bore no shield. Soon after his arrival, a servant breathlessly announced he had just seen a large block of stone floating down the river, into which a beautiful sword was thrust to the hilt. On hearing this, Arthur and his knights hurried down to the landing place, but, although the stone paused there, neither the king nor any of the nobles at his court were able to draw out the sword. It became evident it was intended for Galahad only, when he easily drew it out of the stone. It was then, according to this version, that the other knights pledged themselves to go in quest of the Holy Grail. Riding off alone, Galahad came to an abbey, where hung a white shield bearing a red cross, which he learned had once belonged to the king of Sarras, who was converted by Joseph's son. The red cross was drawn with blood, and was to remain undimmed for its future bearer, Galahad.
The young champion, thus completely equipped, rode off and next arrived at the enchanted Castle of the Holy Grail. There he saw Titurel, the sleeping king, and Amfortas, the acting king, before whom the Grail passed unseen because he had sinned. Silently Galahad watched the mystic procession of bleeding spear, miraculous dish or cup, and Seven-branched Candlesticks. Like Parzival he hesitated to ask any questions, and failed to achieve the Holy Grail, because, although possessing all other virtues, he could not entirely forget himself for the sake of others and thus lacked true sympathy or altruism. Thrust out of the Castle—like Parzival—he wandered through a blighted country, where he met the Loathley Damsel, who in punishment for her sins was turned loose into the world to work evil to men. She hotly reviled Galahad for not having asked the momentous question, and the youth, learning thus in what way he had been wanting, solemnly vowed to return to the castle and atone for his omission.
But meantime the enchanted Castle had vanished, and Galahad, the Champion of Purity,—whose red color he always wears,—travelled through the world, righting the wrong. He arrived thus at the gate of a castle defended by seven knights,—the Seven Deadly Sins,—with whom he struggled to such good purpose that he defeated them, and was free to enter into the Castle of the Maidens, or place where the Active Virtues have long been kept in durance vile. But, the door still being locked, Galahad was glad to receive the key proffered by an old monk, who, in the legend, personified Righteousness.
Galahad, the emblem of a pure soul, now penetrated into the castle, where the maidens blessed him for setting them free, and where he modestly received their thanks. Among these maidens was Lady Blanchefleur, Galahad's match in purity, to whom he bade farewell as soon as their nuptials were solemnized, for he realized The Quest could be achieved only by a virgin knight.
Once more Galahad rides through the world, and this time he again finds and enters into the castle of the Grail, where he once more beholds the Sacred Mysteries. His heart full of sympathy for the suffering Amfortas, he now overlooks the rules of formal politeness in his desire to help, and propounds the decisive question. Immediately a refulgent light shines forth from the veiled Grail in all its life-giving radiance, and King Amfortas, healed of his sin, and hence able to see the vessel, dies of joy, just as an angel bears the priceless treasure away from the Enchanted Castle, where it is no longer to sojourn.
Longing for the time when he too can see the Grail unveiled, Galahad remounts his milk-white steed and rides through the world, where everybody thanks him for freeing the world of the pall of darkness and sin which has rested upon the land ever since Amfortas, titulary guardian of the Holy Grail, sinned so grievously. Riding thus, Galahad comes at last to the sea, where King Solomon's ship awaits him. This vessel has been miraculously preserved for this purpose, and sent here to convey him safely to Sarras, "the spiritual place." It is the present home of the Holy Grail, which had already sojourned there after the death of Joseph of Arimathea.
The ship in which Galahad embarks is steered by an angel, one of the Guardians of the Holy Grail, and the cup it holds, although closely veiled from profane glances, casts beams of refulgent light upon Galahad and his companions Sir Percival and Sir Bors. They two, however, not being perfectly pure, cannot clearly distinguish the Grail, whose sight fills the soul of Galahad with ineffable rapture. Before long the ship arrives at Sarras, the fabulous city, where Galahad can hang up his sword and shield and take his well-earned rest, for the Quest is at last achieved! The travellers are welcomed by an old man, and, when the king of Sarras dies, the people unanimously elect Galahad their next ruler.
After governing them wisely for a year, Galahad—who prayed in King Solomon's ship that he might pass out of the world whenever he should ask it—begged for the death of the body so he might find the eternal life of the soul.
When he died, the Holy Grail, which had been piously guarded in Sarras, returned to heaven, for Galahad's work was finished on earth, as is indicated by the frescos of the Boston library, where angels guard a Golden Tree of achievement whose branches reach right up into heaven.