Very interesting excerpt from
The World as Will and Representation [pp. 26-28 in the later translation provided at wordpress --
https://digitalseance.files.wordpre...r-the-world-as-will-and-representation-v1.pdf
"...The systems that start from the object have always had the whole world of perception and its order as their problem, yet the object which they take as their starting-point is not always this world or its fundamental element, namely matter. On the contrary, a division of these systems can be made in accordance with the four classes of possible objects set out in the introductory essay. Thus it can be said that Thales and the Ionians, Democritus, Epicurus, Giordano Bruno, and the French materialists started from the first of those classes, or from the real world. Spinoza (because of his conception of substance, as merely abstract and existing only in his definition), and before him the Eleatics, started from the second class, or from the abstract concept. The Pythagoreans and the Chinese philosophy of the I Ching started from the third class, namely from time, and consequently from numbers. Finally, the scholastics, teaching a creation out of nothing through the act of will of an extramundane personal being, started from the fourth class, namely from the act of will, motivated by knowledge.
The objective method can be developed most consistently and carried farthest when it appears as materialism proper. It regards matter, and with it time and space, as existing absolutely, and passes over the relation to the subject in which alone all this exists. Further, it lays hold of the law of causality as the guiding line on which it tries to progress, taking it to be a self-existing order or arrangement of things,
veritas aeterna, and consequently passing over the understanding, in which and for which alone causality is. It tries to find the first and simplest state of matter, and then to develop all the others from it, ascending from mere mechanism to chemistry, to polarity, to the vegetable and the animal kingdoms. Supposing this were successful, the last link of the chain would be animal sensibility, that is to say knowledge; which, in consequence, would then appear as a mere modification of matter, a state of matter produced by causality.
Now if we had followed materialism thus far with clear notions, then, having reached its highest point, we should experience a sudden fit of the inextinguishable laughter of the Olympians. As though waking from a dream, we should all at once become aware that its final result, produced so laboriously, namely knowledge, was already presupposed as the indispensable condition at the very first starting-point, at mere matter. With this we imagined that we thought of matter, but in fact we had thought of nothing but the subject that represents matter, the eye that sees it, the hand that feels it, the understanding that knows it. Thus the tremendous
petitio principii [9] disclosed itself unexpectedly, for suddenly the last link showed itself as the fixed point, the chain as a circle, and the materialist was like Baron von Munchhausen who, when swimming in water on horseback, drew his horse up by his legs, and himself by his upturned pigtail. Accordingly, the fundamental absurdity of materialism consists in the fact that it starts from the objective; it takes an objective something as the ultimate ground of explanation, whether this be matter in the abstract simply as it is thought, or after it has entered into the form and is empirically given, and hence substance, perhaps the chemical elements together with their primary combinations. Some such thing it takes as existing absolutely and in itself, in order to let organic
nature and finally the knowing subject emerge from it, and thus completely to explain these; whereas in truth everything objective is already conditioned as such in manifold ways by the knowing subject with the forms of its knowing, and presupposes these forms; consequently it wholly disappears when the subject is thought away.
Materialism is therefore the attempt to explain what is directly given to us from what is given indirectly. Everything objective, extended, active, and hence everything material, is regarded by materialism as so solid a basis for its explanations that a reduction to this (especially if it should ultimately result in thrust and counter-thrust) can leave nothing to be desired. All this is something that is given only very indirectly and conditionally, and is therefore only relatively present, for it has passed through the machinery and fabrication of the brain, and hence has entered the forms of time, space, and causality, by virtue of which it is first of all presented as extended in space and operating in time.
From such an indirectly given thing, materialism tries to explain even the directly given, the representation (in which all this exists), and finally even the will, from which rather are actually to be explained all those fundamental forces which manifest themselves on the guiding line of causes, and hence according to law. To the assertion that knowledge is a modification of matter there is always opposed with equal justice the contrary assertion that all matter is only modification of the subject's knowing, as the subject's representation. Yet at bottom, the aim and ideal of all natural science is a materialism wholly carried into effect. That we here recognize this as obviously impossible confirms another truth that will result from our further consideration, namely the truth that all science in the real sense, by which I understand systematic knowledge under the guidance of the principle of sufficient reason, can never reach a final goal or give an entirely satisfactory explanation. It never aims at the inmost nature of the world; it can never get beyond the representation; on the contrary, it really tells us nothing more than the relation of one representation to another."
9 "Begging of the question." [Tr.]
{note: I've paragraphed the above text to facilitate its readability.}