Pride
This myth involves Lucifer's rebellion against God, very known among Christians. Lucifer was the first angel and a Seraph to be created as the mightiest. He had the most intelligence and power in Heaven, second only to God himself. His radiance outshone that of any other angel and his beauty was unmatched anywhere in Heaven. Unfortunately, Lucifer became very ambitious and self-centered, until one day he decided that he was going to show everyone his power. To prove this he was going to raise his throne to the height of God's throne. However, other angels didn't approve Lucifer's plan, as they did not want a lower being trying to be equal to God and his power. When Lucifer went ahead with his plan, he was instantly hurled out of Heaven.
It should be noted that this account for the rebellion might come from ancient Canaanite manuscripts that deal with one of their own deities, a being by the name of Shahar. Shahar was thrown out due to the same shortcoming that Lucifer had, pride.