There's knowledge here you can't possibly comprehend – Part II

This evening became a little hectic, but I wanted to make sure I gave all of you archeologists the answers to the Indiana Jones Adventure messages, especially if you worked hard to crack the code. We’ll talk about Mara and her Temple of the Forbidden Eye more later, but for now we’ll have to be content with her cryptic cryptograms.

The first little beauty offers us:
EARTHLY RICHES

Even once deciphered, this message is a little cryptic:
ONLY THE BLIND SHALL SEE

Propaganda, pure and simple:
MARA SHALL GUIDE YOU THROUGH THE DOORWAY IN THE CHAMBER OF DESTINY