To Epiphanius.
It was my wish to summon you to the feast of holy Apostles and Prophets, not only as a citizen, but as one who shares both my faith and my home. But I am prevented by the state of your opinions. Therefore I put forward no other claims than those of our country, and I invite you to participate in the precious blessing of the holy Apostles and Prophets. This participation no difference of sentiment hinders.
Source: Letters (New Advent)