Revelation 1:3

Blessed [is] he that readeth,.... This book the Revelation, privately, in his closet or family, carefully and diligently, with a desire of understanding it; or publicly in the church of God, and endeavours open and explain it to others; and may allude to the reading of the law and the prophets in the synagogues, which were not barely read, but expounded; see Ac 13:15; and the rather this may be thought to be the sense of the words, since there is a change of number in the next clause,and they that hear the words of this prophecy; that listen attentively to the reading and exposition of this book, and have ears to hear, so as to understand the prophecies contained in it: for the whole, when delivered to John, was a prophecy of things to come: but some versions read the number alike in both clauses; as either, "blessed is he that readeth, and he that heareth", as the Vulgate Latin and Ethiopic versions; or "blessed are they that read, and they that hear", as the Arabic version:and keep those things which are written therein; the last version adds, "concerning this frail world"; who not only read, and hear, but put in practice what they read and hear; for there are some things in this book which are of a practical nature, especially in the epistles to the seven churches; or the sense is, happy are those persons that observe, and take notice of what is written herein, and meditate upon them, and well weigh them in their minds, and retain them in their memories.