Immanuel Kant
Kant published a second edition of the "Critique of Pure Reason" ("Kritik der reinen Vernunft") in 1787, heavily revising the first parts of the book. Most of his subsequent work focused on other areas of philosophy. He continued to develop his moral philosophy, notably in 1788's "Critique of Practical Reason" (known as the second "Critique") and 1797's "Metaphysics of Morals". The 1790 "Critique of Judgment" (the third "Critique") applied the Kantian system to aesthetics and teleology. It was in this critique where Kant wrote one of his most popular statements, ""it is absurd to hope that another Newton will arise in the future who will make comprehensible to us the production of a blade of grass according to natural laws"".
Johann Gottlieb Fichte
Reviews were assuming Kant was the author when Kant cleared the confusion and openly praised the work and author. Fichte's reputation skyrocketed as many intellectuals of the day were of the opinion that it was "the most shocking and astonishing news... [since] nobody but Kant could have written this book. This amazing news of a third sun in the philosophical heavens has set me into such confusion". Karl Popper considers the book as essentially "a fraud" which though rather boring cleverly imitated Kant's style and that the rumours that Kant himself had written the book to be contrived. Kant waited seven years to make public statement about the incident; after considerable external pressure he dissociated himself from Fichte. In his statement, he inscribed, "May God protect us from our friends. From our enemies, we can try to protect ourselves."