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
From Zurich, Fichte returned to Leipzig in May 1790. In the spring of 1791, he obtained a tutorship at Warsaw in the house of a Polish nobleman. The situation, however, quickly proved disagreeable and he was released. He then got a chance to see Kant at Königsberg. After a disappointing interview on July 4 of the same year, he shut himself in his lodgings and threw all his energies into the composition of an essay which would compel Kant's attention and interest. This essay, completed in five weeks, was the "Versuch einer Critik aller Offenbarung" ("Attempt at a Critique of All Revelation", 1792). In this book, according to Henrich, Fichte investigated the connections between divine revelation and Kant's critical philosophy. The first edition of the book was published without Kant's or Fichte's knowledge, moreover without Fichte's name or signed preface. It was thus mistakenly thought to be a new work by Kant himself.