The present study is the first monograph in Spanish that analyzes in a systematic and comprehensive thinking F. W. J. Schelling (1775-1854) which, together with Fichte and Hegel, one of the leading representatives of German Idealism. The book focuses particularly on its so-called "middle philosophy," but the most important period known of his work. This stage covers since 1809, when it appears on the free trial, until his later philosophy and dark, the Philosophy of Mythology and Revelation, in which Schelling analyzes different mythologies as basic to understanding the essence of Christianity as historical fact. Faced with this philosophy of Hegel, merely because of negative philosophy based solely on the thought-Schelling proposes a positive philosophy that accounts for the worldliness and historicity of all living things: a true "science of life." Schelling develops a philosophy of Spirit Hegel opposed to a system of freedom to tolerate a systematic conception of the reason that neither opposes nor denies freedom-namely, human freedom, but requires it and the underlying , marking the passage of a metaphysics of reason to a metaphysics of the will. Against the classical scheme Schelling understood as an intermediate link in the chain that would go from Kant to Hegel, Pérez-Borbujas presents schellinguiano thought as the true summit of German Idealism, which is now open to radical fact of existence, a data of revelation that precedes reason, opening the path that we follow Schopenhauer, Kierkegaard, Freud and Nietzsche. This book first introduces the reader a Schelling "consistent and over," evolutionary, but deeply contemporary currents of thought that emerge in the late nineteenth and early twentieth centuries.