I can doubt everything, including the perceptions of my senses, the existence of the external world, and even my own thoughts. But in the very act of doubting, I am thinking, and thus I cannot doubt the existence of myself as a thinking being. This is the foundation of all knowledge: “I think, therefore I am.”
Morality is essentially a power struggle between the strong and the weak. Traditional morality, especially slave morality, is created by the weak to control the will of the strong. Morality is not universal; it is a product of culture and history, serving as a tool to maintain power structures. The strong, by creating new moral values, transcend the old standards of good and evil, demonstrating their will to power.
The lives of most people are enslaved, bound by morality, social rules, and religious doctrines, stripping them of their individuality. The weak have created these constraints to suppress the will of the strong. True freedom can only be attained by transcending these artificial limits and embracing the pain and struggle of life, liberating the enslaved mind to become the true Übermensch.