This chapter presents an outline of Immanuel Kant's project in the Critique of Pure Reason and his views of reason and the unconditioned. It provides a sketch of the most basic features of Schelling's project as it is developed in the Form-Schrift, focusing on how his argument for several specific features of the first principle he identifies is based on Kant's considerations concerning the unconditioned. The chapter then focuses on the Ich-Schrift, noting the main ways in which it represents an advance over the Form-Schrift. It provides a closer analysis and evaluation of central features of Schelling's argument by responding to a series of objections raised by Dieter Henrich. Finally, the chapter shows that Kant's specific views on the unconditioned play a crucial and underappreciated role in the development of fundamental aspects of Schelling's early philosophy.