One day a fool wandered into the castle and found the king alone. And being a fool, he was simple minded, he didn’t see a king. He only saw a man alone and in pain. And he asked the king, “What ails you friend?” The king replied, “I’m thirsty. I need some water to cool my throat”. So the fool took a cup from beside his bed, filled it with water and handed it to the king. As the king began to drink, he realized his wound was healed. He looked in his hands and there was the holy grail, that which he sought all of his life. And he turned to the fool and said with amazement, “How can you find that which my brightest and bravest could not?”
And the fool replied, "I don’t know. I only knew that you were thirsty."