God Helps Those Who Help Themselves
A witch found two children playing beside a river and stole them away. They succeeded in escaping one day, but the witch set off to bring them back. A good fairy, who was passing by, saw the children and took pity on them. She set a great ring of fire around them to keep them safe, but the witch managed to blow out the flames.
So, the fairy built round them a high wall of glass so smooth that it could not be climbed. The witch returned to her house to find a hammer to break it with, but when she returned the fairy had spirited the children away, and they were safe at home.
Fortune favors the brave.