"Now this computation of Easter, which we set forth to you to be followed, is contained in a cycle of nineteen years, which began long since to be observed in the Church, to wit, even in the time of the Apostles, especially at Rome and in Egypt, as has been said above.
But by the industry of Eusebius, who took his surname from the blessed martyr Pamphilus, it was reduced to a plainer system; insomuch that what till then used to be enjoined every year throughout all the Churches by the Bishop of Alexandria, might, from that time forward, be most easily known by all men, the occurrence of the fourteenth moon being regularly set forth in its course. This Paschal computation, Theophilus, Bishop of Alexandria, made for the Emperor Theodosius, for a hundred years to come.
Cyril also, his successor, comprised a series of ninety-five years in five cycles of nineteen years.
After whom, Dionysius Exiguus added as many more, in order, after the same manner, reaching down to our own time.
The expiration of these is now drawing near, but there is at the present day so great a number of calculators, that even in our Churches throughout Britain, there are many who, having learned the ancient rules of the Egyptians, can with great ease carry on the Paschal cycles for any length of time, even to five hundred and thirty-two years, if they will; after the expiration of which, all that appertains to the succession of sun and moon, month and week, returns in the same order as before.
We therefore forbear to send you these same cycles of the times to come, because, desiring only to be instructed respecting the reason for the Paschal time, you show that you have enough of those catholic cycles concerning Easter."
Sydämessään sen myös tuntee. <3