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 added in the present edition, for he has indicated, by signs in the original context corresponding to other similar signs in the MS. passages, the places where he wished his additions to be inserted. All that was left for me to do, was to give in extended form a few citations he had purposed adding.
No essential corrections and additions, such as might modify the fundamental thoughts of the work, will be found in this new edition, which simply contains corrections, amplifications, and corroborations, many of them interesting and important. Let me take only a single instance § 21, on the " Intellectual Nature of Empirical Perception." As Schopenhauer attached great importance to his proof of the intellectual nature of perception, nay, believed he had made a new discovery by it, he also worked out with special predilection all that tended to
