Apostle John recorded Rv 1:1-8 as a summary of Revelation after he saw and heard the events of all the chapters of Revelation. Since Rv 1:3 is part of this summary of Revelation, the three entities mentioned in the title of this article—the one who reads, those who hear, and those who obey (Rv 1:3)—can be found elsewhere in Revelation. Anyone who desires the correct answer to the question in the title should ask Jesus, Apostle John, or the pastor in the position of Apostle John who ate the open book of Revelation in Rv 10 in reality. The one who reads is Apostle John who eats the scroll in 10; those who hear are the nations, peoples, languages, and kings in Rv 10; those who obey are the 144,000 and the great multitude in white robes in Rv 1:1, Rv 7, and Rv 14.