純粋実践理性の権能について : カント倫理学の構造(5)

Abstract

"Kant accepts that the practical function of pure reason has the different peculiar meaning from the theoretical knowledge. The pure reason can determine the will and produce the real action of man. And that is the aplication of the category of causality to the pure practical reason. So the laws of pure practical reason (moral laws) as the cause can produce the real practices of man. Kant's critique of reason was the effect of Hume's critique of the law of causality. Hume asserts that the concept of causality as the concept a priori has not any reality, and he negates its real adequacy. But Kant demonstrates that the concept of causality has the adequacy a priori to the objects as the appearances, because it is the condition of experience. And he asserts that the concept of causality has its place in the pure reason and its applicabity to the object in general. When the pure reason acts practically, can the pure reason be the cause to determine the will as noumenon. Then the reason is regarded as causa noumenon and can determine the acts and will of human being by the practical laws of pure reason (moral laws). And then the pure reason is regarded as a member of the intelligble world and determined by the different order from the laws and order of the real world. And this is the extension of pure reason beyond the real world of experience and the reason has the right of this extension. But this extension of knowledge can have only the practical meaning but not any theoretical meaning. Then what is the theoretical meaning of practical action in this real world? This is the problem of Kant's practical philosophy. We can consider this theory not as the two- world theory, but as the theory which asserts the two-aspects in the same real world."