The bishop had problems
One of the diocese’s main problems was that its bishops kept getting killed.
The problems in his own diocese did not blind him to the problems of the Church elsewhere. In fact, he was so moved by the plight of one diocese that he wrote them a letter, even though they were many hundreds of miles away and had already received letters and personal visits from the most exalted authorities in the Church.
The bishop's letter turned out to be truly magnificent. Copies were made and it would be read throughout the world.
As for the letter writer himself, the good bishop would indeed be killed, as had been the three bishops before him: his friends and mentors Cletus, Linus, and Peter - the fisherman from Galilee who had been named by Christ himself.
The letter that St. Clement, martyr and fourth bishop of Rome, had written to the Corinthians remains widely read still and his memory is celebrated on this day.
(adapted from an earlier post)