AntiquityIranGerman idealism (also known as post-Kantian idealism, post-Kantian philosophy, or simply post-Kantianism) was a philosophical movement that emerged in Germany in the late 18th and early 19th centuries. It began as a reaction to Immanuel Kant's Critique of Pure Reason. German idealism was closely linked with both Romanticism and the revolutionary politics of the Enlightenment....Fichte who, because the thing-in-itself had just been discredited, at once prepared a system without any thing-in-itself. Consequently, he rejected the assumption of anything that was not through and through merely our representation, and therefore let the knowing subject be all in all or at any rate produce everything from its own resources. For this purpose, he at once did away with the essential and most meritorious part of the Kantian doctrine, the distinction between a priori and a posteriori and thus that between the phenomenon and the thing-in-itself. For he declared everything to be a priori, naturally without any proofs for such a monstrous assertion; instead of these, he gave sophisms and even crazy sham demonstrations whose absurdity was concealed under the mask of profundity and of the incomprehensibility ostensibly arising therefrom. Moreover, he appealed boldly and openly to intellectual intuition, that is, really to inspiration.Maimon claimed that the dualism between these faculties was analogous to the old Cartesian dualism between the mind and body, and that all the problems of the older dualism should hold mutatis mutandis for the new one. Such was the heterogeneity between understanding and sensibility, Maimon further argued, that there could be no criterion to determine how the concepts of the understanding apply to the intuitions of sensibility. By thus pointing out these problematic dualisms, Maimon and the neo-Humean critics left a foothold open for skepticism within the framework of Kant’s own philosophy. For now the question arose how two such heterogeneous realms as the intellectual and the sensible could be known to correspond with one another. The problem was no longer how we know that our representations correspond with things in themselves but how we know that a priori concepts apply to a posteriori intuitions.What characterizes Fichte’s, Schelling’s, and Hegel’s speculative idealism in contrast to Kant's critical idealism is the recurrence of metaphysical ideas from the rationalist tradition. What Kant forbade as a violation of the limits of human knowledge, Fichte, Schelling, and Hegel saw as a necessity of the critical philosophy itself. Now Maimon was the crucial figure behind this transformation. By reviving metaphysical ideas from within the problematic of the critical philosophy, he gave them a new legitimacy and opened up the possibility for a critical resurrection of metaphysics.German Idealism, when we study it as a product of its own age and country, is a most engaging phenomenon; it is full of afflatus, sweep, and deep searchings of the heart; but it is essentially romantic and egoistical, and all in it that is not soliloquy is mere system-making and sophistry. Therefore when it is taught by unromantic people ex cathedra, in stentorian tones, and represented as the rational foundation of science and religion, with neither of which it has any honest sympathy, it becomes positively odious – one of the worst impostures and blights to which a youthful imagination could be subjected. German idealism (also known as post-Kantian idealism, post-Kantian philosophy, or simply post-Kantianism) was a philosophical movement that emerged in Germany in the late 18th and early 19th centuries. It began as a reaction to Immanuel Kant's Critique of Pure Reason. German idealism was closely linked with both Romanticism and the revolutionary politics of the Enlightenment. The most notable thinkers in the movement were Johann Gottlieb Fichte, Friedrich Wilhelm Joseph Schelling, Georg Wilhelm Friedrich Hegel, and the proponents of Jena Romanticism (Friedrich Hölderlin, Novalis, and Karl Wilhelm Friedrich Schlegel). Friedrich Heinrich Jacobi, Gottlob Ernst Schulze, Karl Leonhard Reinhold, Salomon Maimon and Friedrich Schleiermacher also made major contributions. The word 'idealism' has multiple meanings. The philosophical meaning of idealism is that the properties we discover in objects depend on the way that those objects appear to us, as perceiving subjects. These properties only belong to the perceived appearance of the objects, and not something they possess 'in themselves'. The notion of a 'thing in itself' should be understood here as an option of a set of functions for an operating mind, such that we consider something that appears without respect to the specific manner in which it appears. The term 'idea-ism' is closer to this intended meaning than the common notion of idealism. The question of what properties a thing might have 'independently of the mind' is thus unknowable and a moot point, within the idealist tradition. Kant's work purported to bridge the two dominant philosophical schools in the 18th century: 1) rationalism, which held that knowledge could be attained by reason alone a priori (prior to experience), and 2) empiricism, which held that knowledge could be arrived at only through the senses a posteriori (after experience), as expressed by philosopher David Hume, whom Kant sought to rebut. Kant's solution was to propose that, while we depend on objects of experience to know anything about the world, we can investigate a priori the form that our thoughts can take, determining the boundaries of possible experience. Kant called his mode of philosophising 'critical philosophy', in that it was supposedly less concerned with setting out positive doctrine than with critiquing the limits to the theories we can set out. The conclusion he presented, as above, he called 'transcendental idealism'. This distinguished it from classical idealism and subjective idealism such as George Berkeley's, which held that external objects have actual being or real existence only when they are perceived by an observer. Kant said that there are things-in-themselves, noumena, that is, things that exist other than being merely sensations and ideas in our minds. Kant held in the Critique of Pure Reason that the world of appearances (phenomena) is empirically real and transcendentally ideal. The mind plays a central role in influencing the way that the world is experienced: we perceive phenomena through time, space and the categories of the understanding. It is this notion that was taken to heart by Kant's philosophical successors. Arthur Schopenhauer considered himself to be a transcendental idealist. In his major work The World as Will and Representation he discusses his indebtedness to Kant, and the work includes Schopenhauer's extensive analysis of the Critique. The Young Hegelians, a number of philosophers who developed Hegel's work in various directions, were in some cases idealists. On the other hand, Karl Marx, who was numbered among them, had professed himself to be a materialist, in opposition to idealism. Another member of the Young Hegelians, Ludwig Feuerbach, advocated for materialism, and his thought was influential in the development of historical materialism, where he is often recognized as a bridge between Hegel and Marx.