Abstract

The goal of this dissertation is two-fold. It is, first, to reconstruct Kant's argument against self-murder, and, second, to analyze the function of the principle of self-preservation of reason with regard to the prohibition of self-murder. I argue that self-murder is contrary to the principle of self-preservation of reason and violates the trustee-relationship between the homo phaenomenon and the homo noumenon. The analysis shows that moral self-preservation in Kant is a rational principle which serves to secure the possibility of moral faith and self-perfection. ;In the first part of the dissertation, I provide a comprehensive analysis of Kant's argument against self-murder by examining all of the relevant statements in his works, the Nachlass, as well as the lectures recorded by Herder, Powalski, Collins, and Vigilantius. Since self-murder violates a perfect duty to oneself, key-topics of the analysis are: the dual status of the duty of self-preservation as both inner duty of right and duty of virtue, the right and end of humanity, as well as Kant's model of self-possession in terms of proprietas. The analysis makes clear that self-murder destroys the moral self and must be distinguished from sacrificing one's life in order to preserve one's moral integrity. ;In the second part of the dissertation, I interpret the duty of self-preservation and the prohibition of self-murder in the context of Kant's doctrine of the faith of reason and the principle of self-preservation of reason. I first provide an overview of the debate on self-preservation and its implications for an understanding of modern rationality and summarize the different meanings of -preservation in Kant. I then argue that the "principle of self-preservation of reason" consists in what Kant calls "the maxim of healthy reason" and that it grounds the faith and the unity of reason. Against the background of this analysis, I interpret the trustee-relationship between the homo phaenomenon and the homo noumenon as a model of moral self-obligation. Entrusting the homo phaenomenon to the homo noumenon, I contend, means to entrust life to practical reason and to subject oneself to the moral law