As a corollary we have to add that the Guide cannot be called a theological work, for Maimonides does not know of theology as a discipline distinct from metaphysics. Nor is it a book of religion, for he expressly excludes religious, together with ethical topics from the subject matter of his work. Until we shall have rediscovered a body of terms which are flexible enough to fit Maimonides' thought, the safest course will be to limit the description of the Guide to the statement that it is a book devoted to the explanation of the secret teaching of the Bible.