While on Patmos, he was given the awe - inspiring vision of Revelation, which he carefully put down in writing. It is generally thought that he was released from exile during the reign of Roman Emperor Nerva.
لَا يُمْكِنُ ٱلْإِنْكَارُ أَنَّ ٱلَّذِينَ يَخْدُمُونَ يَهْوَه بِأَمَانَةٍ مُنْذُ عُقُودٍ حَقَّقُوا أَمْرًا فَرِيدًا لَا يُمْكِنُ تَحْقِيقُهُ بِطَرِيقَةٍ أُخْرَى :‏ سِجِلُّ ٱحْتِمَالٍ لَا يُمْحَى .‏