A better understanding of what it is all about and an assurance that the good guys win in the end. You don't have to understand it but it might help if you did. According to Daniel, it will all be revealed as the end nears. With the internet the whole world can learn something overnight.
Lamb is mentioned 27 times in the Apocalypse. John the Apostle knew John the Baptist knew the Lamb of God. Who else would use the word lamb 27 times in a document?
Here we have Irenaeus in the second century talking about ancient copies of the Apocalypse. We also have Victorinus and Eusebius not aware of the seven churches of the Apocalypse in the 3rd and 4th centuries.
How would you explain that?
Irenaeus ancient copies Eusebius Victorinus
From Church History by Eusebius, Book 5 Chapter 8 has this about Irenaeus born 130 AD:
In the fifth book he speaks as follows concerning the Apocalypse of John, and the number of the name of
Antichrist:
"As these things are so, and this number is...
You definitely have to include John Paul the Great. He gave us the Catechism of the Catholic Church which I didn't think was necessary until Francis came along.