The text commences with an exhaustive critique of Kantian philosophy, honoring Kant's distinction between the phenomenon and the thing in itself while systematically dismantling his errors. The author examines the transcendental aesthetic and the Transcendental Analytic, arguing that Kant's categories of the understanding are overly symmetrical and conceptually confused. By exposing contradictions in Kant's treatment of pure reason, the critique addresses the false identification of intuitive and abstract knowledge. The analysis proceeds through the Transcendental Dialectic, challenging the three traditional ideas of reason regarding the soul, the world, and God.
The antinomies of pure reason are re-evaluated, demonstrating that the theses rest on subjective intellectual fatigue while the antitheses align with objective laws. The discussion critiques rational psychology, cosmological speculations, and the ontological proof of God's existence, stripping speculative theology of its dogmatic authority. The treatise transitions into practical reason, examining the nature of the will, moral imperatives, and ethical motivation.
Criticising Kant's categorical imperative and his formulation of the highest good, the author contrasts rational egoism with genuine virtue. Finally, the text evaluates the critique of judgment, exploring aesthetics, the sublime, and teleology in nature. The work culminates in establishing the transition from the philosophy of the object to the realization that the world is fundamentally an idea dependent on the knowing subject.