Free as life and the free-formed spirit itself, ever new, wonderful, versatile, and infinitely varied, both in internal structure and external manifestation, are the ways of man's thinking and speculative spirit. A ready and apposite illustration will clearly demonstrate this peculiar freedom and manifold variety in the methods, species, and developments of philosophy. At any rate, if it do not place it vividly before our eyes, it at least suggests the idea of it. The written dialogues of Plato—that great master of philosophical exposition and of the thinking dialogue of science, with its ever-living and changing play of thought, and earnest spirit of investigation—are perhaps not less diversified in their course; not less wonderfully manifold and exuberant with all the riches of genius; not less peculiar in their general conception, as well as external development; not less exquisite in the finish of the several parts and divisions, than the poetical productions of the greatest and most admired of dramatists.
Friedrich Schlegel, Philosophy of Language (p. 343).