Immanuel Kant begins this foundational work by addressing the structural gap in his critical philosophy between the Understanding, which governs theoretical knowledge of nature, and Reason, which governs practical freedom. Recognizing that neither pure knowledge nor moral laws fully account for the human experience of feeling, he introduces the faculty of Judgement. Kant posits that Judgement operates through an a priori principle of subjective purposiveness, serving as the necessary transition between nature and freedom.
The first main division explores the Aesthetical Judgement, focusing on Taste and the Beautiful. Kant establishes that a pure judgement of taste must be entirely disinterested, independent of charm, emotion, or the concept of perfection. Beauty is defined as the form of an object's purposiveness perceived without any representation of a definite purpose. Although aesthetic judgements are subjective and non-cognitive, they lay claim to universal validity and necessitate the presupposition of a common sense among all rational beings.
Moving beyond the Beautiful, Kant analyzes the Sublime, categorizing it into the mathematically and the dynamically sublime. Unlike the peaceful contemplation inspired by beauty, the sublime induces a momentary check on the vital powers, arising when sensible intuition proves inadequate to comprehend the immense magnitude or overwhelming might of nature. This inadequacy forces the mind to recognize its own supersensible destination and the superiority of Reason over sensibility, thereby provoking a complex feeling of pain mingled with deep respect.
The second main division turns to the Teleological Judgement, which examines objective purposiveness in natural organisms. Kant distinguishes between the mechanical laws of nature and its technical or purposive operations, noting how living things exhibit an intrinsic organization where parts exist for the sake of the whole. He addresses the limitations of human understanding, arguing that while we cannot prove a conscious designer scientifically, our cognitive faculties compel us to view living systems through the regulative Idea of natural purposes.
Kant further critiques various historical philosophical systems, rejecting crude materialism, hylozoism, and Spinozism as inadequate explanations for the order and purpose observed in the universe. He maintains that theoretical reason cannot achieve objective knowledge of the supersensible, rendering the existence of God a matter of moral faith rather than theoretical certainty. The work ultimately lays the groundwork for later idealism by suggesting that the sensible world and the world of thought share a common supersensible substrate.
