When those who were responsible for its publication undertook the task of preparing it for the press, it was very little more than a vast collection of notes and rough drafts, set down by Nietzsche from time to time, as the material for his chief work; and, as any liberty taken with the original manuscript, save that of putting it in order, would probably have resulted in adding or excluding what the author would on no account have added or excluded himself, it follows that in some few cases the paragraphs are no more than hasty memoranda of passing thoughts, which Nietzsche must have had the intention of elaborating at some future time.
— from The Will to Power: An Attempted Transvaluation of All Values. Book I and II by Friedrich Wilhelm Nietzsche