Schelling attempts to ground the universality and necessity of knowledge not in the nature of things, but in the nature of our mind. From the nature of the finite spirit, the general and necessary connection of our concepts is to be deduced. In order to simultaneously guarantee the objective reality of the systematic connection of our concepts, the nature of things is to be constructed with the deduction. "From now on, there is no separation between experience and speculation. The system of nature is at the same time the system of our mind (...)". With the identity of the system of knowledge and the system of the objects of knowledge, Schelling seeks to establish the ideality and reality of knowledge. Schelling finds the prerequisites for his ideal-realism at least implicitly contained in the writings of Kant and Fichte. The result of his work.