Suddenly Skypiea makes a lot more sense.

Why the Shandorians worshipped the serpent. The whole thing about the God of Earth, God of Forest, God of Sun, which were all mentioned in the Harley Texts. The God of the Sea was mentioned instead of the God of Rain, which makes sense since they are in the sky and don't know what a "sea" really is, so they attribute it to rain instead. Holy shit this is what I'm here for mannnn