The intriguing question for which man’s reason searches for an answer is: What is reason? Indeed, the 2500 year old history of reason is a prolonged search for the definition of reason. The 18th century was called the Age of Reason, but it’s not clear even in our times, the 21st century, how reason operates in man’s mind, what its limitations are, and what its relationship is to instinct. The philosophies are incapable of investigating reason because a focus on reason has the paradoxical effect of driving a philosophy towards rationalization and dogmatism. In the last 300 years, the word “reason” has by itself become a sepulcher that holds the remains of the dead philosophies, which, during their short lifetime, dared to overreach their aspirations and call themselves “philosophy of reason”.