The brothers came from a political family
The world, however, would not leave them alone.
A great need was being felt in many places for the Gospel of Christ, but different problems posed obstacles in various places.
In one distant location, there were simply no teachers well-educated in the faith, so the brothers were called out of their monastery and sent.
In another location, the native people resisted anything not in their language. This was complicated by the fact that they did not have a well-developed written language. Once again, the brothers were chosen. The younger brother actually devised a whole new alphabet, whereupon they translated the Gospels and many prayers into the native people’s language.
Sadly, success sometimes brings new challenges, especially envy, rivalry, and other political problems. People from Western regions attacked them – after all, the brothers were Easterners. They were summoned to Rome where they were not only vindicated but selected to become bishops!
The younger brother, St. Cyril, Apostle to the Slavs and inventor of the Cyrillic alphabet (used to this day), died shortly afterwards on this very day in the year 869. His brother, St. Methodius, Apostle to the Slavs, continued their work and their struggles until his own death in 885.
(from an earlier post)