The Emerald Tablet

A few dozen lines, surviving first in Arabic — the most compressed esoteric text in the West. "That which is above is as that which is below, and that which is below is as that which is above, to accomplish the miracle of the One Thing." Everything the Tree says about four worlds mirroring one another, about Malkhut being Keter's foot and Keter Malkhut's crown, is said here in a sentence. Newton translated it. It is the ancestor of the correspondence-thinking the whole app runs on.