Book excerpt: Fear, the most powerful force in our life, is the least understood. Every one of us experiences it. Many arrange their lives to avoid it. Yet nearly every one of us needs to find more fear. Most of us know fear as the unwanted force that drives phobias, anxieties, unhappiness, and inhibits self-actualization. Ironically, fear is the underlying phenomenon that heightens awareness and optimizes physical performance, and can drive ambition, courage, and success. Harnessing fear can heighten emotional intelligence and bring success to every aspect of your life. Neuroscience and current research on how the brain processes and uses fear have torn the lid off the possibilities of human performance; yet most people are not reaching their complete potential because of a psychological roadblock Sweeney calls the Fear Frontier. Identifying your Fear Frontier and addressing it, Sweeney illustrates in these pages, is the path to success, happiness and fulfillment in almost all aspects of your life. He also provides the most effective steps toward rewiring your mind for a healthier longer life based on courage. Fear is Fuel is a practical guide that instructs readers on a unique path toward translating fear into optimal living. By facing fears, and challenging new ones, readers can harness the power of unique motivations to achieve more, experience more, and enjoy more. The path to a fulfilling life is not to avoid fear but to recognize it, understand it, harness it, and unleash its power.