Ask Mr. Donn
How did the ancient Greek storytellers all know the same myths?
Many myths were retold over and over, because the story was so good. But any storyteller might create a new adventure for the gods or might change a story slightly to make it more interesting to his listeners. What was important is that the gods' personalities remained the same. Everyone in ancient Greece knew the gods' personalities, including the storytellers! There was no changing that. The Truth About Myths