How did Immanuel Kant’s ideas influence German idealism?

Immanuel Kant’s philosophy served as the foundational catalyst for German idealism, a movement that sought to establish a basis for ethics and aesthetics beyond the limits of empirical knowledge. While Kant’s Critique of Pure Reason famously set boundaries on human reason by denying the possibility of certain knowledge in metaphysics, later idealists shifted their focus toward his Critique of Practical Reason and Critique of Judgment to explore the moral self and the purposiveness of the universe.12

Key influences of Kant’s ideas on the movement include:

• The Moral Self: Idealists like Johann Gottlieb Fichte, Friedrich Schelling, and G.W.F. Hegel embraced the concept of the human self and its consciousness as the primary datum of philosophy, emphasizing the volitional and moral elements over the purely intellectual.2
• Transcendental Framework: Kant’s "Copernican revolution"—the idea that objects must conform to the mind’s a priori principles—provided the framework for idealists to argue that reality is spiritual or "constitutive" of reason itself.32
• Metaphysical Expansion: Disciples of idealism sought to transcend the barriers of empirical investigation, viewing the world as a "cosmic self" and attempting to prove the existence of a realm of the good, the true, and the beautiful.12