Hermes Trismegistos
The mythical figure of Hermes Trismegistos is thought to be one of the most significant sources for various alchemical, philosophical, esoteric and spiritual teachings, including astrology. He might be considered to be the original great thinker on such subjects. The word 'trismegistos' is Greek in origin and could be translated as "Thrice-great Hermes" or "The Greatest of All". The designation originates from a time in which Greek culture was heavily influenced by Egyptian culture and is the Greek name of the ancient Egyptian god of script and scholarship, Thor. His famous maxim "as above, so below" is only a considerably shortened rendering of the Tabula Smaragdina which records his spiritual insights. Its most essential declaration is: "That which is below corresponds to that which is above.
And that which is above corresponds to that which is below, in order to perform the wonders of the one. And the unity brings forth the many that are its extension. Its father is the Sun and its mother the Moon". This idea is cited above all by esoteric astrology and exponents of the principle of analogy.