As Cronus cut the penis of his father Uranus some drops of blood felt down on the earth and from them arose the Erinyes: Alecto, Tisiphone and Megaira. These creatures were cruel and irreconcilable gods that ruled over people’s conscience and punished every breach of someone’s oath. For example, they hunted Orest a great part of his life and, even as the court in supervision of Athena considered him innocent, they continued to hunt him.
The Erinyes also appeared in dreams and thoughts, making the guilty people listen their voices all the time until they became crazy… and there was no place on Earth where one could hide. In fact, they were some kind of divine justice acting by their own responsibility.