Summary: If it is useful, it survives. The ruins of the technology of the mind can be seen in the rituals, ancient buildings like temples, mantras, deities and symbolism that still exists in a hollow or corrupted form. With enough knowledge, one can decipher the meaning from such practices, and can see that in ancient times, the technology of the mind was extremely evolved. There is a possibility to revive most of it, to reinvent it, or to invent new mental technologies.
