The motif Purification with water is a part of: Magic
Water, purification, magic, power
With clear water from a near-by spring, the priest sprinkled her neck and face, commanding the unclean spirit to leave her, and blessing her with the sign of the cross in Christian fashion. But the waters of baptism have no power unless faith wells from within.
Even so, against the evil that struggled within her, he had opposed a power more mighty than his own human strength. Her arms dropped to her sides, as she gazed in pale-faced astonishment at this man whom she took for a mighty magician, skilled in sorcery and in the secret arts. Those were magic runes he had repeated, and mystic signs he had traced in the air. She would not have flinched had he shaken a keen knife or a sharp ax in her face, but she flinched now as he made the sign of the cross over her head and heart. She sat like a tame bird, with her head drooped upon her breast.
Gently he spoke to her of the great kindness she had shown him during the night, when she had come in the guise of a hideous frog to sever his bonds, and to lead him out into light and life again. He said she was bound by stronger bonds than those which had bound him, but that he would lead her out of darkness to eternal life. He would take her to the holy Ansgarius at Hedeby, and there in the Christian city the spell that had power over her would be broken. But he would not let her sit before him on the horse, even though she wished it. He dared not.
"You must sit behind me on the horse, not in front of me," he said, "for your enchanted beauty has a power that comes of evil, and I fear it. Yet, with the help of the Lord, I shall win through to victory."
He knelt and prayed devoutly and sincerely. It seemed as if the quiet wood became a church, consecrated by his prayers. The birds began to sing as if they belonged to the new congregation. The wild mint smelt sweet, as if to replace incense and ambergris, and the young priest recited these words from the Bible:
"To give light to them that sit in darkness, and in the shadow of death; to guide our feet into the ways of peace."
While he spoke of the life everlasting, the horse that had carried them in wild career stood quietly by, and pulled at the tall bramble bushes until the ripe juicy berries fell into Helga's hand, offering themselves for her refreshment.
Patiently, she let herself be lifted on horseback, and sat there like one in a trance, neither quite awake nor quite asleep. The priest tied two green branches in the shape of a cross, and held it high as they rode through the woods. The shrubs grew thicker and thicker, until at last they rode along in a pathless wilderness.