Response

From the given context, there is not sufficient information directly related to the origins of the word "sole" or its symbolism in ancient civilizations. However, the text does mention an association between "the prints of the Prince who has left his sole behind as he stepped off the earth" and ancient grave shapes in Paleolithic Spain. The necessity for new Prints to be able to fill their father's shoes is described as a very old concept, but the specific origins and symbolism of the word "sole" are not provided in the context.