βAs above, so below,β is a common phrase in occultism that describes the laws of magick. It comes from an ancient Arabic alchemical text from around the 9th century called the Emerald Tablet, attributed to Hermes Trismegistus.
I think it's extremely interesting that Isaac Newton, who is credited with writing our modern laws of physics, studied these metaphysical laws as well. Here's his translation of the first lines:
βTis true without lying, certain and most true. That which is below is like that which is above and that which is above is like that which is below to do the miracle of one only thing.β
-The Emerald Tablet, trans. Sir Isaac Newton