Here’s the theory I’ve read:
-There are aliens who started evolving much earlier than humans. Eventually they overcame the physics of existing only in physical bodies, and learned how to travel across galaxies via energy vehicles, rather than physical craft.
-These aliens also learned a lot of wisdom. They learned that the purpose of life is to better understand and become more like the Creator, the Godhead, the Source, etc.
-They came to Earth to help humans advance more quickly, so they could learn the purpose of life earlier. In fact, they helped engineer humans’ DNA so that Java Man could eventually become Homo Sapiens, with language and intellect. Actually, because of the experience of being an intelligent mind in a physical body subject to hunger, injury, and disease, and also many sensory pleasures, humans had the capacity to be better at understanding the purpose of life than the aliens themselves.
-Certain shapes and structures are effective at connecting 4th dimension Earth to the 5th dimension. For example, pyramid and ziggurat shapes.
-The aliens taught the humans about pyramids, and helped them build them using their knowledge of physics and energy manipulation. The pyramids could never have been built otherwise. (An engineer has calculated that it with Bronze Age technology and just human an animal power, it would have taken tens of thousands of years to build the pyramids. In other words, they would not even be finished yet. Each block of the Great Pyramid weighs 2.3 metric tons, and there are over 2.3 million of them).
-The ancient humans considered the alien helpers gods, and gave them names such as Thoth, Ra, Set, Zeus and Hera.
-The alien visitors