The disputes of philosophers provide a place to view their positions and arguments in a tightly focused way, and also in a manner that is infused with human temperaments and passions. Fichte and Schelling had been perceived as "partners" in the cause of Criticism or transcendental idealism since 1794, but upon Fichte's departure from Jena in 1799, each began to perceive a drift in their fundamental interests and allegiances. Schelling's philosophy of nature seemed to move him toward a realistic philosophy, while Fichte's interests in the origin of personal consciousness, intersubjectivity, and the ultimate determination of the agent's moral will moved him to explore what he called "faith" in one popular text, or a theory of an intelligible world. This volume brings together the letters the two philosophers exchanged between 1800 and 1802 and the texts that each penned with the other in mind.