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...ments Continuing from the previous page: These are the three logical "moments" or stages in the process of reasoning. in the process of reasoning are regarded by Kant as indicating three distinct faculties. These are the focus of the "Analytic of Concepts," the "Analytic of Principles," and the "Dialectic," respectively. However, the full significance of this important classification does not seem to have occurred to Kant at the time, as we can see from the order in which he wrote his great books.¹
The first problem that captures the attention of all modern philosophers is, of course, the problem of knowledge: its conditions and its proper objects. In the Critique of Pure Reason, this is discussed, and the conclusion is reached that nature as a phenomenon original: "phenomenon." In Kant's philosophy, this refers to the world as it appears to our senses, rather than the world as it exists in itself. is the only object of which we can hope to acquire any exact knowledge.
But it is apparent that there are other problems which deserve consideration; a complete philosophy includes practice as well as theory; it has to deal not only with logic, but with life. And thus the Critique of Practical Reason was written, in which the doctrine of human freedom is unfolded, standing in sharp contrast with the necessity of natural law. At first sight, it seems as if we have now covered the whole field of human activity. For we have investigated the sources of knowledge, and at the same time have pointed out the conditions of practical life, and have seen that the laws of freedom are just as true in their own sphere as the laws of nature are in theirs.
¹ Dr. Caird (The Critical Philosophy of Immanuel Kant, vol. ii. p. 406) has given an instructive account of the gradual development in Kant’s mind of the main idea of the Critique of Judgment.