Should the letter of Revelation have been understandable to the recipients?
B. Hodge, Biblical Authority Ministries, May 24, 2020
The seven churches were to whom the book of Revelation was written. So they should have been able to understand it. Revelation 1:1-3 indicates that this letter was written as an unveiling or disclosing, which is the meaning of “Revelation”, to those it was written. In Revelation 1:1, it is to “to show His servants—things which must shortly take place”.
In Revelation 1:3, it says “Blessed is he who reads and those who hear the words of this prophecy, and keep those things which are written in it.” So logically, they needed to understand it if they were to keep it.
Read Revelation 5-10:10. (Yes, you are right, this seems like a lot to read but remember, it is only a small part of a letter after all.)