The theme of the opera is taken from the cycle of Holy Grail myths to which "Lohengrin" also belongs. The reader will remember that Lohengrin in his final address declares himself son of Parsifal, the King of the Grail; and it is with this Parsifal that Wagner's last work is concerned. Parsifal, like Siegfried, represents free human nature in its spontaneous, impulsive action. He is styled in the text, "Der reine Thor" (the guileless fool), who, in consonance with the old mythological idea, overcomes the evil principle and gains the crown by dint of pure natural impulse. The opera differs widely from "The Nibelung Ring." The composer has used the free instead of the alliterative form of verse, which he then contended was best adapted to musical setting. In "The Ring" the chorus is not introduced at all until the last division is reached, while in "Parsifal" it plays an important part in every act, in the second scene of the first act there being three choirs on the stage at a time. Still there is no trace of the aria, the duet, or the recitative, of the Italian style, though there is plenty of concerted music, which grows out of the dramatic necessities of the situations. When these necessities do not urge themselves, the music flows on in dialogue form, as in "The Ring."

The vorspiel is based upon three motives connected with the mystery of the Grail, which forms the key-note of the opera, though in a different aspect from that which the Grail assumes in "Lohengrin," where it can only be visible to the eye of faith, while in "Parsifal" it distinctly performs its wonders. Let it be remembered that the Grail is the chalice from which Christ drank with his disciples at the Last Supper, and in which his blood was received at the cross. The first of these motives is of the same general character as the Grail motive in the "Lohengrin" vorspiel; the second is an impressive phrase for trumpets and trombones, which will be heard again when the Knights of the Grail are summoned to their duties; and the third is a broad, dignified melody in the chorale form.

The action of the drama occurs in the north of Spain, and in the vicinity of Monsalvat, the Castle of the Holy Grail, where this chalice was brought by angels when Christianity was in danger. The curtain rises upon a lovely forest glade on the borders of a lake, at daybreak, and discovers the Grail Knight, Gurnemanz, and two young shield-bearers, guardians of the castle, sleeping at the foot of a tree. Trumpet-calls, repeating the motive first heard in the prelude, arouse them from their sleep; and as they offer up their morning prayer the chorale is heard again. As they wend their way to the castle, they meet two knights preceding the litter upon which the wounded Amfortas, King of the Grail, is carried. In the subsequent dialogue Gurnemanz tells the story of the King's mishap. He is suffering from a wound which refuses to close, and which has been inflicted by the sacred spear,—the spear, according to the legend, with which our Saviour's side was pierced. Klingsor, a magician, had aspired to become a knight of the Grail, but his application was refused; for only those of holy lives could watch the sacred vessel and perform its ministrations. In revenge, Klingsor studied the magic arts and created for himself a fairy palace, which he peopled with beautiful women, whose sole duty it was to seduce the Knights of the Grail. One of these women, a mysterious creature of wonderful fascinations, Kundry by name, had beguiled Amfortas, who thus fell into the power of Klingsor. He lost his spear, and received from it a wound which will never heal so long as it remains in the hands of the magician. In a vision he has been told to wait for the one who has been appointed to cure him. A voice from the Grail tells him the following mystery:—

"Durch Mitleid wissend,
Der reine Thor,
Harre sein'
Den ich erkor."

["Let a guileless fool only, knowing by compassion, await him whom I
have chosen.">[

Meanwhile, as the shield-bearers are carrying Amfortas towards the lake, the savage, mysterious Kundry is seen flying over the fields. She overtakes Gurnemanz and gives him a balm, saying that if it will not help the King, nothing in Arabia can, and then, refusing to accept thanks or reveal her identity, sinks to the ground in weariness. The King takes the drug with gratitude; but she scorns thanks, and sneers at those about her with savage irony. Gurnemanz's companions are about to seize her, but the old Knight warns them that she is living incarnate to expiate the sins of a former life, and that in serving the Order of the Grail she is purchasing back her own redemption. As Gurnemanz concludes, cries are heard in the wood, and two knights, approaching, announce that a swan, the bird sacred to the Grail, which was winging its way over the lake, and which the King had hailed as a happy omen, has been shot. Parsifal, the murderer, is dragged in, and when questioned by Gurnemanz, is unaware that he has committed any offence. To every question he only answers he does not know. When asked who is his mother, Kundry answers for him: "His mother brought him an orphan into the world, and kept him like a fool in the forest, a stranger to arms, so that he should escape a premature death; but he fled from her and followed the wild life of nature. Her grief is over, for she is dead." Whereupon Parsifal flies at her and seizes her by the throat; but Gurnemanz holds him back, and Kundry sinks down exhausted. Parsifal answers to the "Thor," but it remains to be seen whether he is the "reine Thor." Gurnemanz conducts him to the temple where the holy rites of the Grail are to be performed, hoping he is the redeemer whom the Grail will disclose when the love-feast of the Saviour is celebrated.

The scene changes to the great hall of the castle and the celebration of the feast of the Grail. The scene is introduced with a solemn march by full orchestra, including trombones on the stage, accompanied by the clanging of bells as the knights enter in stately procession. They sing a pious chant in unison, the march theme still sounding. As the younger squires and pages enter, a new melody is taken in three-part harmony, and finally an unseen chorus of boys from the extreme height of the dome sing the chorale from the introduction, without accompaniment, in imitation of angel voices. The shield-bearers bring in Amfortas upon his litter, when suddenly from a vaulted niche is heard the voice of Titurel, Amfortas's aged father, and the founder of Monsalvat, now too feeble to perform the holy offices, bidding the Grail to be uncovered. Amfortas, mourning that he, the unholiest of them, should be called, opens a golden shrine and takes out the crystal vessel. Darkness falls upon the hall, but the Grail is illuminated with constantly increasing brilliancy, while from the dome the children's voices sing, "Take My blood in the name of our love, and take My body in remembrance of me." Parsifal watches the scene with bewildered eyes, but upon saying in reply that he does not understand the holy rite, he is contemptuously ejected from the place.

The second act reveals Klingsor's enchanted palace. The magician gazing into a mirror sees Parsifal approaching, and knows he is the redeemer who has been promised. He summons Kundry before him, and commands her to tempt him with her spells. She struggles against the task, for in her soul the powers of good and evil are always contending for the mastery. She longs for eternal sleep, and rest from her evil passions, but Klingsor holds her in his power. Parsifal enters, and the scene changes to a delightful garden filled with girls of ravishing beauty in garments of flowers. They crowd about him, and by their fascinating blandishments seek to gain his love, but in vain. He is still the "guileless fool." Then Kundry appears in all her loveliness, and calls him by name, the name he had heard his mother speak. He sorrowfully sinks at Kundry's feet. The enchantress bends over him, appeals to him through his longing for his mother, and kisses him. Instantly he comprehends all that he has seen, and he cries, "The wound burns in my heart, oh, torment of love!" Then quickly rising he spurns her from him. He has gained the world-knowledge. She flies to him again, and passionately exclaims, "The gift of my love would make thee divine. If this hour has made thee the redeemer, let me suffer forever, but give me thy love." He spurns her again, and cries, "To all eternity thou wouldst be damned with me, if for one hour I should forget my mission," but says he will save her too, and demands to know the way to Amfortas. In rage she declares he shall never find it, and summons the help of Klingsor, who hurls the sacred lance at Parsifal. The weapon remains suspended over his head. He seizes it and makes the sign of the Cross. The gardens and castle disappear. Parsifal and Kundry are alone in a desert. She sinks to the ground with a mournful cry, and turning from her, his last words are, "Thou knowest where only thou canst see me again."

In the third act we are again in the land of the Grail. Parsifal has wandered for years trying to find Monsalvat, and at last encounters Gurnemanz, now a very old man, living as a hermit near a forest spring, and the saddened Kundry is serving him. It is the Good Friday morning, and forests and fields are bright with flowers and the verdure of spring. Gurnemanz recognizes him, and in reply to his question what makes the world so beautiful, the aged knight makes answer:—

"The sad repentant tears of sinners
Have here with holy rain
Besprinkled field and plain,
And made them glow with beauty.
All earthly creatures in delight
At the Redeemer's trace so bright,
Uplift their prayers of duty.
And now perceive each blade and meadow flower,
That mortal foot to-day it need not dread."