Contents
The Metaphysical Elements of Ethics (1780)
The Critique of Practical Reason (1788)
Fundamental Principles of the Metaphysic of Morals (1785)
The Critique of Pure Reason (1781)
The Critique of Pure Reason (1781)
Human reason, in one sphere of its cognition, is called upon to consider questions, which it cannot decline, as they are presented by its own nature, but which it cannot answer, as they transcend every faculty of the mind.
Metaphysical Elements of Ethics -
If there exists on any subject a philosophy (that is, a system of rational knowledge based on concepts), then there must also be for this philosophy a system of pure rational concepts, independent of any condition of intuition, in other words, a metaphysic.