Across diverse ancient civilizations, fasting wasn't merely an act of deprivation but a profound practice deeply interwoven with their spiritual, intellectual, and physical well-being. From the philosophical schools of ancient Greece, where figures like Pythagoras employed it for mental clarity and discipline, to the Egyptians who utilized periods of abstinence for spiritual purification and healing, the underlying wisdom was clear: periodic caloric restriction offered a pathway to a more robust existence. These societies intuitively understood what modern science is now validating: that giving the body a break from constant digestion could initiate cellular repair mechanisms, enhance cognitive function, and foster a sense of inner peace. Their "longevity secret" wasn't a specific diet, but a holistic approach that recognized the interconnectedness of mind, body, and spirit, believing that a cleansed internal state contributed not only to spiritual enlightenment but also to physical resilience and a longer, healthier life. Thus, the ancients' fasting practices represent an enduring legacy of wisdom, offering timeless insights into human well-being.