If there is a rulebook it is exegesis and tradition.
I don’t know about “tradition,” but exegesis means simply Bible interpretation. Here are some definitions of exegesis I found on the internet:
- An explanation or critical interpretation (especially of the Bible)
- An exposition or explanation of a text, especially a religious one
- The act of establishing meaning of a text from the text itself. It attempts to determine the intended meaning of the text.
- The process or act of interpreting (Biblical) texts.
- The art of close reading in order to interpret a text.
- Analyzing passages from a document – often the Bible – to understand what it meant to its author and others in the author’s culture.
- The process of discerning the meaning of a text for its original, historical audience.
- The careful, systematic study of the Scripture to discover he original, intended meaning, …
And who is to say that your exegesis is better than mine?
The apocalypse uses the image of horseriders to symbolize what Jesus is talking about in Mat 24. There will be no one literally riding a horse when this occurs.
Two answers to that: Firstly, the text is more complex than that. It involves all kinds of weird and wonderful beasts, and strange voices coming from strange places etc. Giving a plausible interpretation just for the “horses” doesn’t go very far in interpreting the broader context of the Revelation that deals with all the implications of what we are discussing.
Secondly, that might appear to be a plausible interpretation of the “horses;” but still not an in depth analysis. According to the rules of “exegesis” described above, you have to take the entire context of the scriptures (and a lot of other factors) into account in order to do a proper and in depth exegesis. For example, do the following verses from Zechariah have a bearing in providing and accurate exegesis of the “horses” in Revelation?
Zechariah 6:
1 And I turned, and lifted up mine eyes, and looked, and, behold, there came four chariots out from between two mountains; and the mountains were mountains of brass.
2 In the first chariot were red horses; and in the second chariot black horses;
3 And in the third chariot white horses; and in the fourth chariot grisled and bay horses.
4 Then I answered and said unto the angel that talked with me, What are these, my lord?
5 And the angel answered and said unto me, These are the four spirits of the heavens, which go forth from standing before the Lord of all the earth.
6 The black horses which are therein go forth into the north country; and the white go forth after them; and the grisled go forth toward the south country.
7 And the bay went forth, and sought to go that they might walk to and fro through the earth: and he said, Get you hence, walk to and fro through the earth. So they walked to and fro through the earth.
8 Then cried he upon me, and spake unto me, saying, Behold, these that go toward the north country have quieted my spirit in the north country.
It looks like they might! So interpreting it the way you have done might be a little bit too superficial. There may be more to it than that.