The Basis of Morality by Part 2 Chapter 1 Page 4

Fortunately, he separated his Ethics from the exposition of its basis, devoting to the latter a special work entitled the Grundlegung zur Metaphysik der Sitten, the theme of which will be found to be precisely the same as that of our prize essay.

For on page xiii of the preface he says: “The present treatise is nothing else but an attempt to find out and establish the supreme principle of morality. This is an investigation, whose scope is complete in itself, and which should be kept apart from all other moral researches.”. It is in this book that we find the basis, that is to say, the essentials of his Ethics set forth with an acute penetration and systematic conciseness, as in no other of his writings. It has, moreover, the great advantage of being the first of Kant's moral works, appearing, as it did,