Abstract
In presenting the key theoretical notions in Jacobi’s philosophical work, this paper shows how these notions are operative in Schellings late philosophy and in Kierkegaard. It is argued that Jacobi’s criticism of Spinozist rationalism is echoed in Schelling’s and Kierkegaard’s criticism of Hegelian speculation as it is shown that Jacobi’s distinction between two different kinds of knowledge, i.e. demonstration and illumination, is also at the very heart of Schelling’s and Kierkegaard’s philosophy. On this background the article finally discusses some important similarities between Schelling and Kierkegaard, stressing the importance of the concept of the will as well as the relation between negativity and positivity.