Immanuel Kant : a brief chronology -- Groundwork for the metaphysics of morals -- Immanuel Kant, "an answer to the question : what is enlightenment?" (1784) -- From Immanuel Kant, Critique of practical reason (1788) -- From Immanuel Kant, "on the common saying : 'this may be true in theory, but it does not apply in practice'" (1793) -- From Immanuel Kant, Religion within the limits of reason alone (1793, 1794) -- From Immanuel Kant, Metaphysics of morals (1797) -- From a letter from Johann Gottlieb Fichte to Karl Leonhard Reinhold (1795) -- From Friedrich von Schiller and Wolfgang von Goethe, Xenian (1796) -- From Georg Wilhelm Friedrich Hegel, Lectures on the history of philosophy (1831) -- From Henry Sidgwick, The methods of ethics (1907).