2 - Microcosm and Macrocosm

Did you ever consider this fact: Everything you have ever experienced about the world has been signals sent to your brain from your senses. The ancient Greeks thought of the human experience as one of being on the inside, looking out. Man is his own little kingdom inside a larger kingdom; a microcosm inside the macrocosm. The Emerald Tablet of Hermes states that the things that are within are a reflection of the things that are without. Can the outside world influence the world within - and vice versa?