The booklet closes with the following sentences: “The full and true positivism is embodied in the Catholic Church. The divine revelation which she represents is that which is truly real ... truly sure ... truly precise ... truly organic ... truly useful. The deepest root, however, and the most essential nature of all true positivism (this is vouched for by reason as well as by revelation) is not the relative but the absolute.” Here we conclude our review of the book. We have however to add a few words which concern _The Monist_ as well as all the publications of The Open Court Publishing Co. Hermann Gruber mentions in his book _The Open Court_ and its editor together with the societies for ethical culture. We have, ourselves, characterised our views as positivism and as monism, but we stated at the same time that our positivism had nothing to do with Comte or with any one of Comte’s disciples.[24] They have (with the sole exception of Ribot and I should hesitate to call him a Comtean) contributed little if anything to the formation of our views. The name Positivism is a good and expressive word and we have adopted it because taken in its proper meaning it represents the true principle of modern philosophy. However we cannot agree with any of the fundamental tenets either of Comte or of his most positivistic and most scientific disciple Littré.[25] Comte as well as Littré are radical agnostics they repeat again and again that “We can know nothing about first and final causes. Positive philosophy denies nothing and maintains nothing.” According to our view of the subject this attitude is rather negativism than positivism. But it is not even negativism; it is worse, it is mere scepticism leading to indifferentism. It sounds very philosophical to speak of the inscrutability of first and final causes but the very terms “first causes” and “final causes” are most nonsensical and self-contradictory concepts. (See “Fundamental Problems,” pp. 88-90, and 101.) Comte and Littré imagine to have conquered metaphysics, but in fact they are the worst kind of metaphysicians. They believe in the ghosts of metaphysics as strongly as some mediæval minds believe in devils but are afraid to wrestle with them, because, as they maintain these metaphysical ghosts cannot be conquered.