Synthesized answer
Portions of the "Fourfold Root" have become antiquated due to the subsequent development of the empirical sciences [5]. Additionally, some sections, such as Schopenhauer's denunciation of plagiarism in the cases of Brandis and Rosas at the beginning of Physiology and Pathology, are considered to have no interest for the present-day reader [5].
The provided passages do not specify which particular sections of the "Fourfold Root" have become antiquated, beyond the general categories mentioned. They also do not detail the specific empirical sciences that have led to these portions becoming antiquated.
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
y. ARTHUR SCHOPENHAUER. FRANKFURT AM MAIN, _September, 1847._ EDITOR'S PREFACE TO THE THIRD EDITION. In the present volume I lay before the public the Third Edition of the "Fourfold Root," including the emendations and additions left by Schopenhauer in his own interleaved copy. I have already had occasion elsewhere to relate that he left copies of all his works thus interleaved, and that he was wont to jot down on these fly-leaves any corrections and additions he might intend inserting in future editions. Schopenhauer himself prepared for the press all that has been…
378 ON THE FOURFOLD ROOT OF THE PRINCIPLE OF SUFFICIENT REASON. A PHILOSOPHICAL TREATISE. Ναὶ μὰ τὸν ἁμετέρᾳ ψυχᾷ παραδόντα +τετρακτύν+, Παγὰν ἀενάου φύσεως +ῥιζώματ'+ ἔχουσαν. THE AUTHOR'S PREFACE TO THE SECOND EDITION. This treatise on Elementary Philosophy, which first appeared in the year 1813, when it procured for me the degree of doctor, afterwards became the substructure for the whole of my system. It cannot, therefore, be allowed to remain out of print, as has been the case, without my knowledge, for the last four years. On the other hand, to send a juvenile work…
s the "Fourfold Root" in the present volume.) [74] Hesiod, ἔργα, 293. [75] Macchiavelli, "Il principe," cap. 22. One must indeed be forsaken by all the gods, to imagine that the outer, perceptible world, filling Space in its three dimensions and moving on in the inexorable flow of Time, governed at every step by the laws of Causality, which is without exception, and in all this merely obeying laws we can indicate before all experience of them--that such a world as this, we say, can have a real, objective existence outside us, without any agency of our own, and that it can then…
e how much they might learn from me: that is, all that their children and their children's children will learn from me. They prefer to sit down and spin a long metaphysical yarn, each out of his own thoughts, for the benefit of the public; and no doubt, if fingers are a sufficient qualification, they have it. How right was Macchiavelli when he said, as Hesiod[74] before him: "There are three sorts of heads: firstly, those which acquire knowledge of things and comprehend them by themselves; secondly, those which recognise the truth when it is shown them by others; and thirdly, those…
of this remarkable thinker, yet whose acquaintance with German does not permit them to read his works in the original. Now although some portions of both the Essays published in the present volume have of course become antiquated, owing to the subsequent development of the empirical sciences, while others--such as, for instance, Schopenhauer's denunciation of plagiarism in the cases of Brandis and Rosas in the beginning of Physiology and Pathology[2]--can have no interest for the reader of the present day, I have nevertheless given them just as he left them and refrained from all…