In constructing an abstract ethics of reason, addressing a general rational subject, Enlightenment and modernity have forgotten old age. By contrast, the ancient ethics of happiness asked what a good life might be for people in specific life stages, such as the aged. Nowadays, it is important to regain this tradition. Thus this chapter poses the question: What does it mean for a finite being to age but still lead a good life? During the process of aging, a radicalization of our vulnerable corporality and finitude takes place. This becoming-oneself-in-aging must be understood not only in its ethical meaning, but also implies a correction of our modern understanding of man.