This chapter describes Immanuel Kant’s object was to limit the scepticism of David Hume and the “dogmatic” metaphysics of the Wolff-Leibniz school and having completed the positive side of his theory of knowledge. Analytic Kant, completed his exposition of the conditions that make knowledge possible. Kant’s final position in relation to the idea of noumena, but, as is well known, much controversy has centred round the point, a number of critics holding that the idea of the thing in itself is not consistent with Kant’s theory of knowledge. Starting with the mathematical principles—the “Axiom of Intuition” and the “Anticipation of Perception”—these determine all phenomena as extensive and intensive quanta, and therefore justify the application of mathematics to the concrete world. The principles determine things as quantities, and are therefore mathematical; the remainder determine the existence of things—the Analogies of Experience in relation to each other, the Postulates of Empirical Thought in relation to the faculty of knowledge—and are therefore dynamical.