The OT and the NT, are both written in the language of God. The understanding of the symbols used in the NT, should be similar to the meaning of the symbols in the OT.
The universal language of love and the spirit, 1 Cor 2:14, "...the things of the Spirit of God:", " ....they are spiritually discerned."
This means that the "things of God" are to be looked at through the eyes of the spirit, because they are to be understood as good and evil (love and no love). The Bible is a book about good and evil, love and no love, the spirit of God and the spirit of Satan.
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The things shown are love and no love, the dragon and the lamb, in both the OT and NT.
It is the spirit of the dragon to focus on, and the spirit of the lamb. The spirit of the dragon is to destroy Israel, the spirit of the Lamb is to save Israel.
The spirit to destroy Israel is found in the unbelieving gentile nations. These nations are shown in Dan.2.
So the spirit to destroy Israel has taken different forms, expressed as nations in Dan. 2, shown as BEASTS in Dan.7, Rev..
The beasts have the same spirit and the spiritual attributes that go along with the spirit of Satan, to destroy love and Israel. Lies, murder, deception, confusion, they are without reason, untrustworthy, bullies, egocentric, mean, heartless, destroyers of knowledge, without mercy, without kindness, etc..
This spirit passes from nation to nation, each one ruling Israel, but the spirit is the same, the dragon beast spirit.
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The symbols can also be understood as darkness and light.
Light is thought of as good. You can see where you are going, you understand the things around you.
Darkness us generally thought of as evil, not understanding, If the blind lead the blind, both will fall in to the ditch.
So the greatest light of all, the sun, would be the light of God's Law, which would give us understanding and keep us from falling into the spiritual ditch in God's eyes.
The moon shines in times of darkness, when the light from the Law is somehow diminished, The Prophets. They are not the Law, but are a reflection of the Law light, the sun (Law).
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These are symbols that are universal to men through out time.
This is the language of symbolism.
We can't just make our own meaning up from nothing. The symbols should be understood from their original OT context first and then studied in the NT with the OT context meaning in mind.
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Jesus spoke to us in the Rev., in the symbolic language of the OT.
Remember, there was no NT at the time of the writing of the Revelation, only letters from the apostles to the churches instructing them, there was only the OT.
It is the universal language of symbolism of the OT. that Jesus spoke.
It speaks to us through 1000's of years of time.
With some study, we are supposed to understand it, the spirits.