" The gut has not only a remarkable system of nerves to gather all this information, but also a huge surface area. That makes it the body’s largest sensory organ. Eyes, ears, nose, or the skin pale by comparison. The information they gather is received by the conscious mind and used to formulate a response to our environment. They can be seen as life’s parking sensors. The gut, by contrast, is a huge matrix, sensing our inner life and working on the subconscious mind. "

― Giulia Enders , Gut: The Inside Story of Our Body’s Most Underrated Organ