section_path: Biography/Publication of The Critique of Pure Reason
section_name: Publication of The Critique of Pure Reason
paragraph_text: Publication of The Critique of Pure Reason
  
  At age 46, Kant was an established scholar and an increasingly influential philosopher, and much was expected of him. In correspondence with his ex-student and friend Markus Herz, Kant admitted that, in the inaugural dissertation, he had failed to account for the relation between our sensible and intellectual faculties. He needed to explain how we combine what is known as sensory knowledge with the other type of knowledge—that is, reasoned knowledge—these two being related but having very different processes. Kant also credited David Hume with awakening him from a "dogmatic slumber" in which he had unquestioningly accepted the tenets of both religion and natural philosophy. Hume, in his 1739 Treatise on Human Nature, had argued that we only know the mind through a subjective, essentially illusory series of perceptions. Ideas such as causality, morality, and objects are not evident in experience, so their reality may be questioned. Kant felt that reason could remove this skepticism, and he set himself to solving these problems. Although fond of company and conversation with others, Kant isolated himself, and resisted friends' attempts to bring him out of his isolation. When Kant emerged from his silence in 1781, the result was the Critique of Pure Reason. Kant countered Hume's empiricism by claiming that some knowledge exists inherently in the mind, independent of experience. He drew a parallel to the Copernican revolution in his proposal that worldly objects can be intuited a priori, and that intuition is consequently distinct from objective reality. Perhaps the most direct contested matter was Hume's argument against any necessary connection between causal events, which Hume characterized as the "cement of the universe." In the Critique of Pure Reason, Kant argues for what he takes to be the a priori justification of such necessary connection.
  
  Although now recognized as one of the greatest works in the history of philosophy, the Critique disappointed Kant's readers upon its initial publication. The book was long, over 800 pages in the original German edition, and written in a convoluted style. Kant was quite upset with its reception. His former student, Johann Gottfried Herder criticized it for placing reason as an entity worthy of criticism instead of considering the process of reasoning within the context of language and one's entire personality. Similar to Christian Garve and Johann Georg Heinrich Feder, he rejected Kant's position that space and time possessed a form that could be analyzed. Additionally, Garve and Feder also faulted Kant's Critique for not explaining differences in perception of sensations. Its density made it, as Herder said in a letter to Johann Georg Hamann, a "tough nut to crack", obscured by "all this heavy gossamer". Its reception stood in stark contrast to the praise Kant had received for earlier works, such as his Prize Essay and shorter works that preceded the first Critique. Recognizing the need to clarify the original treatise, Kant wrote the Prolegomena to any Future Metaphysics in 1783 as a summary of its main views. Shortly thereafter, Kant's friend Johann Friedrich Schultz (1739–1805), a professor of mathematics, published Explanations of Professor Kant's Critique of Pure Reason (Königsberg, 1784), which was a brief but very accurate commentary on Kant's Critique of Pure Reason.
  
  Kant's reputation gradually rose through the latter portion of the 1780s, sparked by a series of important works: the 1784 essay, " Answer to the Question: What is Enlightenment? "; 1785's Groundwork of the Metaphysics of Morals (his first work on moral philosophy); and Metaphysical Foundations of Natural Science from 1786. Kant's fame ultimately arrived from an unexpected source. In 1786, Karl Leonhard Reinhold published a series of public letters on Kantian philosophy. In these letters, Reinhold framed Kant's philosophy as a response to the central intellectual controversy of the era: the pantheism controversy. Friedrich Jacobi had accused the recently deceased Gotthold Ephraim Lessing (a distinguished dramatist and philosophical essayist) of Spinozism. Such a charge, tantamount to an accusation of atheism, was vigorously denied by Lessing's friend Moses Mendelssohn, leading to a bitter public dispute among partisans. The controversy gradually escalated into a debate about the values of the Enlightenment and the value of reason. Reinhold maintained in his letters that Kant's Critique of Pure Reason could settle this dispute by defending the authority and bounds of reason. Reinhold's letters were widely read and made Kant the most famous philosopher of his era.