Fear is a significant adversary of human thought, often overpowering rationality and critical thinking. While both fear and reason are necessary for our existence, fear tends to dominate the mind, limiting our ability to think clearly. The interplay between these two elements reveals that although reason can sometimes conquer fear, the latter consistently hampers the cognitive processes of individuals.

Edmund Burke, writing in England before the American Revolution, emphasized the debilitating impact of fear on human behavior and thought. He suggested that fear has a unique capacity to inhibit mental faculties, illustrating how it can obstruct our ability to reason effectively. Al Gore, in his book "The Assault on Reason," echoes this sentiment, highlighting the challenges posed by fear in achieving rational discourse and decision-making.