All erroneous systems, whether of philosophy or religion, lie somewhere between these two extremes of false thought. Every species of theoretical or practical unbelief or erring faith, or even of a scientific superstition, either approximates, on the one hand, to naturalism, whether under the garb of a poetical symbolism, or the scientific form of a dynamical theory, or, on the other, to the absolutism of the reason, with its dead formularies. Every religious and every philosophical error is either a subordinate or a distorted species of one or the other—or, it may be, a mixture—a mean compounded of both. Manifold, however, or, rather, innumerable, are the several changes and combinations into which these two elements of infidelity and an erring faith may, and, indeed, actually do, enter.
Schlegel, The Philosophy of Life, Morrison, tr., p. 221.