The youth, however, pays no heed to Kundry's explanations, but goes on to tell Gurnemanz that he saw some men riding through the forest in glittering array, and followed them through the world with no other weapon than the bow he had manufactured. But when Kundry again interrupts him, declaring that his sudden disappearance has caused his mother's death, he shows the greatest sensibility, and even faints with grief.

While the squires gently bathe his face and hands to bring him back to life, Kundry, feeling the sudden and overpowering desire for sleep which often mysteriously overpowers her, creeps reluctantly into a neighbouring thicket, where she immediately sinks into a comatose state. In the mean while, the king's procession comes up from the bath, and slowly passes across the stage and up the hill. Gurnemanz, whose heart has been filled with a sudden hope that the youth before him may be the promised guileless fool who alone can cure the king, puts an arm around him, gently raises him, and, supporting his feeble footsteps, leads him up the hill. They walk along dark passages, and finally come into the great hall on the top of Mount Salvat, which is empty now, and where only the sound of the bells in the dome is heard as Gurnemanz says to Parsifal:—

‘Now give good heed, and let me see,
If thou 'rt a Fool and pure
What wisdom thou presently canst secure.’

Parsifal, the unsophisticated youth, stands spellbound at the marvels he beholds, nor does he move when the great doors open, and the Knights of the Grail come marching in, singing of the mystic vessel and of its magic properties. This strain is taken up not only by the youths who follow them, but also by a boy choir in the dome which is intended to represent the angels. When the knights have all taken their places, the doors open again to admit the bearers of the sacred vessel, which is kept in a shrine. They are followed by Amfortas, in his litter, and when he has been carefully laid upon a couch, and the vessel has been placed upon the altar before him, all bow down in silent prayer. Suddenly the silence is broken by the voice of the aged Titurel. He is lying in a niche in the rear of the hall, and calls solemnly upon his son to uncover the Holy Grail, and give him a sight of the glorious vessel, which alone can renew his failing strength. The boys are about to remove the veil when Amfortas suddenly detains them, and begins a passionate protest, relating how his sufferings increase every time he beholds the Grail. He implores his father to resume the sacred office, and wildly asks how long his sufferings must endure. To this appeal the angels' voices respond by repeating the prophecy made by the Holy Grail:—

‘By pity 'lightened
The guileless Fool—
Wait for him
My chosen tool.’

Strengthened by this reminder of ultimate relief, and by the voice of the knights and of Titurel again calling for the uncovering of the Grail, Amfortas takes the crystal cup from its shrine, bends over it in devout prayer, while the angel voices above chant a sort of communion service, and the hall is gradually darkened. Suddenly a beam of blinding light shoots down through the dome and falls upon the cup, which ‘glows with an increased purple lustre,’ while Amfortas holds it above his head, and gently waves it to and fro, so that its mystic light can be seen by all the knights and squires, who have sunk to their knees.

Titurel hails the sight with a pious ejaculation, and when Amfortas has replaced the vessel in the shrine the beam of light disappears, daylight again fills the hall, and knights and squires begin to partake of the bread and wine before them, a feast to which Gurnemanz invites the amazed Parsifal by a mute gesture. The youth is too astonished to accept; he remains spellbound, while the invisible choir resume their chant, which is taken up first by the youths' voices, and then by the knights, and ends only as the meal draws to a close, and Amfortas is borne out, preceded by the Holy Grail and followed by the long train of knights and squires.

Gurnemanz and Parsifal alone remain. The Fool, though guileless, has not been enlightened by pity to inquire the cause of Amfortas's wound. He has thus missed his opportunity to cure him, and Gurnemanz, indignant at his boundless stupidity, opens a side door, and thrusts him out into the forest, uttering a contemptuous dismissal.

‘Thou art then nothing but a Fool!
Come away, on thy road be gone
And put my rede to use:
Leave all our swans for the future alone
And seek thyself, gander, a goose.’

The second act represents the inner keep of Klingsor's castle, the magician himself being seated on the battlement. He is gazing intently into the magic mirror, wherein all the world may be seen, and comments with malicious glee upon Parsifal's ejection from the temple of the Holy Grail and his approach to his enchanted ground.