This denial of any reasonable ground for belief in immortality in the Critique of Pure Reason (Transcendental Dialectic, bk.
Meyer-Benfey, Herder and Kant (1904); Morris, Kant's Critique of Pure Reason (Chicago, 1882); C. Oesterreich, Kant and die Metaphysik (1906); F.
The progress of thought may show it to be, in truth, relative, as when the nerve of Hume's scepticism is shown to be his thoroughgoing empiricism, or when the scepticism of the Critique of Pure Reason is traced to the unwarrantable assumption of things-in-themselves.
Indirectly, indeed, Kant had indicated a very definite opinion on theology: from the Critique of Pure Reason it was clear that for him speculative theology must be purely negative, while the Critique of Practical Reason as clearly indicated the view that the moral law is the absolute content or substance of any religion.
He is a most difficult writer; different readers understand him differently; and he uses in the earlier parts of his Critique of Pure Reason much of the language of intuitionalism.