In his essay “The Fundamental Principles of the Metaphysics of Morals,” Immanuel Kant divides duties into perfect duties and imperfect duties to self and to others. He then offers examples of neglecting each of these four kinds of duties, among which is suicide. After some general remarks about the first formulation of the categorical imperative itself, the author goes on to consider each one of these examples, and what light they throw upon this first formulation of the supreme principle of morality.