Kant's Explanation of Imagination and Understanding in his First and Third Critiques

In the present article, authors will study imagination and understanding in the first and third Critiques. At first, they will throw a glance on three syntheses in the first Critique (in his three syntheses, Kant shows that how faculties of sensibility, imagination, and understanding work together to acquire knowledge of an idea). Then, they will study each of these faculties in the first and third Critiques. While studying imagination, they will show that in the first Critique, this faculty follows understanding and acts based on its concepts, whereas in the third Critique, it will be freed from such function and schematize even without concepts. When the faculty of understanding is studied, it will be shown that in the first Critique, it acts as the faculty of concepts and only based on them. In the third Critique, it will be separated from its main function, and used by Kant generally and without its concepts.