In 2009, a History Channel presentation of “Decoding the Past”, discussed the last page of the Dresden Codex. If you understand the metaphors, you will get the messages.
“The last page of the Dresden Codex shows the destruction of the world via water. Waves gush from the mouth of a celestial dragon. More flood waters pour from sun and moon symbols on the underside of the monster’s body. An aged goddess also pours flood water onto the Earth. At the bottom of the picture crouches a ruler of the underworld. Above the picture, about half of the 15 glyphs have been destroyed, but a few of the remaining ones consistently refer to “Black Earth” or “Black on High”.”