  The possibility of self-regarding duties of this kind are sometimes rejected on conceptual grounds. Moral duties concern one’s treatment of others, and so a moral duty to oneself is a confused notion. But this worry should not detain us for long. The key point is that we can have categorical reasons to develop our nature or to engage in valuable, as opposed to worthless, activities. It is a secondary issue whether we should classify a self-regarding duty as a moral duty or as (merely) a categorical non-moral duty (Raz 1994, 40). But while the worry should not detain us, it does point to an attractive feature of perfectionist ethics. Much contemporary moral theory ignores duties to oneself, whether understood as moral duties or not, and focuses exclusively on our duties toward others. Perfectionist ethics is an important corrective to this tendency. By expanding the domain of ethical concern, it has the potential to enrich contemporary moral philosophy (Hurka 1993, 5).