Lotze, while reflecting upon the futility of these attempts, himself adopts a method, which he says is the most "convenient," and thereby incurs the censure of Schasler. This method is in fact suitable for his studies in botany and in zoology, but useless for the philosophy of the spirit. Thus both these thinkers maintained Lessing's wrong principle as to the constancy, the limits, and the peculiar nature of each art. Who among aestheticians has criticized this principle? Aristotle had a glimpse of the truth, when he refused to admit that the distinction between prose and poetry lay in an external fact, the metre. Schleiermacher seems to have been the only one who was thoroughly aware of the difficulty of the problem. In analysis, indeed, he goes so far as to say that what the arts have in common is not the external fact, which is an element of diversity; and connecting such an observation as this with his clear distinction between art and what is called technique, we might argue that Schleiermacher looked upon the divisions between the arts as non-existent. But he does not make this logical inference, and his thought upon the problem continues to be wavering and undecided. Nebulous, uncertain, and contradictory as is this portion of Schleiermacher's theory, he has yet the great merit of having doubted Lessing's theory, and of having asked himself by what right are special arts held to be distinct in art. Schleiermacher _absolutely denied the existence of a beautiful in nature_, and praised Hegel for having sustained this negation. Hegel did not really deserve this praise, as his negation was rather verbal than effective; but the importance of this thesis as stated by Schleiermacher is very great, in so far as he denied the existence of an objective natural beauty not produced by the spirit of man. This theory of the beautiful in nature, when taken in a metaphysical sense, does not constitute an error peculiar to aesthetic science. It forms part of a fallacious general theory, which can be criticized together with its metaphysic.