(spoilers ahead) His ultimate plan is to have you remember mathematical formulas that allow for interstellar space travel. Once you have this information, humans will be able to leave Earth and repopulate the universe. Because human consciousness feeds directly into Stan's brain, he will become more powerful if humanity flourishes. This is why Faith's primary goal with you is to inhibit your mathematical abilities -- Stan would be a threat to God if humans were to advance technologically.
(spoilers ahead) His ultimate plan is to have you remember mathematical formulas that allow for interstellar space travel. Once you have this information, humans will be able to leave Earth and repopulate the universe. Because human consciousness feeds directly into Stan's brain, he will become more powerful if humanity flourishes. This is why Faith's primary goal with you is to inhibit your mathematical abilities -- Stan would be a threat to God if humans were to advance technologically.