Final answer:
According to Nietzsche, the source of all virtue is the will to power. Nietzsche believed that acts of kindness and generosity are driven by egoistic motives. His ethical principle challenges traditional notions of virtue and highlights human self-seeking nature.
Step-by-step explanation:
According to Friedrich Nietzsche, the source of all virtue is the will to power. Nietzsche believed that humans have an innate drive to exert their power and influence over others. He argued that acts of kindness and generosity are actually driven by egoistic motives, rather than true altruism. Nietzsche's ethical principle of the will to power challenges traditional ethical notions of virtue and emphasizes the idea that humans are primarily self-seeking.