Then, with one of those quick changes which had at times startled her foster-parents, she dried her tears, and ran quickly to the window. She looked out into the night. It seemed to call her forth to a careless, thoughtless life. Why should she stay when the wind whispered to her and the waters brought her messages from the depths of the sea?
'Ah no, I will have no soul!' cried Undine, turning once more toward the priest. 'I must be free, free as the breezes and the dancing waters.'
'Your love for me will change and grow cold,' said the knight sadly, 'unless you have a human soul. For none can love truly without this precious gift.'
Yet even as he spoke Huldbrand was trying to stifle a fear that had begun to creep into his heart, a fear that the maiden he had wedded was a fairy or a mocking spirit from another world.
But his beautiful wife was smiling softly, for as he had spoken his last words she had learned a secret. And as the knight looked into her blue love-lit eyes he too learned the secret. Through love Undine had won a soul, which is indeed the gift of God to every mortal.