Panhellenism was the reason that connected all Greeks despite their differences between the city-states. Panhellenism was the idea that all Greeks shared a common heritage and culture, and that they should unite against their enemies. This idea was expressed in many ways, including the Olympic Games, the Pythian Games, and the Isthmian Games. These games were held in different Greek city-states, and they brought together athletes and spectators from all over Greece. They were a time for Greeks to celebrate their common heritage and to compete against each other in friendly competition. Panhellenism was also expressed in the Greek myths and legends. These stories told about the gods and heroes of Greece, and they helped to create a sense of shared identity among Greeks.