No one who reads the latter part of this quotation will doubt that Haeckel is a refined, or, in other words, a metaphysical Materialist. That he has produced an effect in materializing circles is evident; witness the following passages from Büchner "the crass." "To any one who does not stubbornly and obstinately cling to old prejudices, this new Cosmology which has superseded the dualism of former systems of philosophy and thought, must appear as clear, simple, free of dualism, easily intelligible and perfectly satisfactory. On account of this very antagonism to the dualistic character of the speculative philosophy of the past, I should like best to designate the philosophy of Materialism as _monistic philosophy_, or _philosophy of unity_; and the cosmology founded upon it as _monism_, in accordance with the suggestion of Professor Haeckel.... Since the indestructibility of matter, as previously described, has found its necessary complement in the indestructibility of force; and since the separation of force and matter has been recognized as a mere abstraction and existing only in our thoughts: it is really impossible to speak any longer of Materialism as a system which derives everything from matter only. Otherwise we might just as well speak of _Dynamism_, that is of a system that derives everything from force (dynamis). But in reality both are identical and inseparable; and therefore a philosophy built upon those ideas cannot be better designated than as _monistic_, or a _philosophy of unity_." (_Materialism, ut supra_ p. 24.) This last phrase is more metaphysical than Büchner's wont; but S. T. Coleridge, if alive, would tell him that what the world really wants, is a "Philosophy of Multeity in Unity." To annihilate the Manifold is to destroy our sole knowledge of the One.