Fear none of those things which thou shalt suffer: behold, the devil shall cast [some] of you into prison, that ye may be tried; and ye shall have (8) tribulation ten days: be thou faithful unto death, and I will give thee a crown of life.
(8) That is, of ten years. For so commonly both in this book and in Daniel, years are signified by days: that God by this might declare, that the space of time is appointed by him and the same very short. Now because John wrote this book in the end of Domitian the Emperor's reign, as Justinus and Ireneus do witness, it is altogether necessary that this should be referred to that persecution which was done by the authority of the emperor Trajan: who began to make havock of the Christian church in the tenth year of his reign, as the historians do write: and his bloody persecution continued until Adrian the emperor had succeeded in his stead: The space of which time is precisely ten years, which are here mentioned.