love.  The disclosure of the secret follows a most exultant song of the Undines ("Rheingold! leuchtende Lust! wie lachst du so hell und hehr!").  In the announcement made by them also occurs the motive of the ring.  The Rhine-daughters, who have fancied that Alberich will never steal the gold because he is in love with them, are soon undeceived, for he curses love, and snatches the gold and makes off with it, pursued by the disconsolate maidens, whose song changes into a sad minor leading up to the next scene.  As they follow him into the dark depths the stream sinks with them and gives place to an open district with a mountain in the background, upon which is the glistening Walhalla, which the giants have just built for the gods.  Wotan and Fricka are discovered awakening from sleep and joyfully contemplating it, the latter, however, filled with apprehension lest the giants shall claim Freia, the goddess of love, whom Wotan has promised to them as the reward for their work.  Loge, the god of fire, however, has agreed to obtain a ransom for her.  He has searched the world over, but has been unable to find anything that can excel in value or attraction the charm of love.  As the gods are contemplating their castle Loge appears, and in a scene of great power, accompanied by music which vividly describes the element he dominates ("Immer ist Undank Loge’s Lohn"), he narrates the tidings of his failure.  The giants, however, have heard the story of the Rhinegold, and as they carry off the weeping Freia agree to release her whenever the gods will give to them the precious and all-powerful metal.  As love departs, the heavens become dark and sadness overcomes the gods.  They grow suddenly old and decrepit.  Fricka totters and Wotan yields to despair.  Darkness and decay settle down upon them.  The divine wills are broken, and they are about to surrender to what seems approaching dissolution, when Wotan suddenly arouses himself and determines to go in quest of the all-powerful gold.  Loge accompanies him, and the two enter the dark kingdom of the gnomes, who are constantly at work forging the metals.  By virtue of his gold Alberich has already made himself master of all the gnomes, but Wotan easily overpowers him and carries him off to the mountain.  The Nibelung, however, clings to his precious gold, and a struggle ensues for it.  In spite of his strength and the power the ring gives to him it is wrenched from him, and the victorious Wotan leaves him free to return to his gloomy kingdom.  Infuriated with disappointment over his loss and rage at his defeat, Alberich curses the ring and invokes misfortune upon him who possesses it.  “May he who has it not, covet it with rage,” cries the dwarf, “and may he who has it, retain it with the anguish of fear;” and with curse upon curse he disappears.  Now that he has the ring, Wotan is unwilling to give it up.  The other gods implore him to do so, and the giants demand their ransom.  He remains inflexible; but at last Erda, the ancient divinity, to whom all things are known, past, present and future, appears to Wotan and warns him to surrender the ring.  She declares that all which exists will have an end, and that a night of gloom will come upon the gods.  So long as he retains the ring a curse will follow it.  Her sinister foreboding so alarms him that at last he abandons the gold.  Youth, pride, and strength once more return to the gods.