There are, first of all, two kinds of authors: those who write for the subject's sake, and those who write for writing's sake. The first kind have had thoughts or experiences which seem to them worth communicating, while the second kind need money and consequently write for money. They think in order to write, and they may be recognised by their spinning out their thoughts to the greatest possible length, and also by the way they work out their thoughts, which are half-true, perverse, forced, and vacillating; then also by their love of evasion, so that they may seem what they are not; and this is why their writing is lacking in definiteness and clearness. Consequently, it is soon recognised that they write for the sake of filling up the paper, and this is the case sometimes with the best authors; for example, in parts of Lessing's _Dramaturgie_, and even in many of Jean Paul's romances. As soon as this is perceived the book should be thrown away, for time is precious. As a matter of fact, the author is cheating the reader as soon as he writes for the sake of filling up paper; because his pretext for writing is that he has something to impart. Writing for money and preservation of copyright are, at bottom, the ruin of literature. It is only the man who writes absolutely for the sake of the subject that writes anything worth writing. What an inestimable advantage it would be, if, in every branch of literature, there existed only a few but excellent books! This can never come to pass so long as money is to be made by writing. It seems as if money lay under a curse, for every author deteriorates directly he writes in any way for the sake of money. The best works of great men all come from the time when they had to write either for nothing or for very little pay. This is confirmed by the Spanish proverb: _honra y provecho no caben en un saco_ (Honour and money are not to be found in the same purse). The deplorable condition of the literature of to-day, both in Germany and other countries, is due to the fact that books are written for the sake of earning money. Every one who is in want of money sits down and writes a book, and the public is stupid enough to buy it. The secondary effect of this is the ruin of language. A great number of bad authors eke out their existence entirely by the foolishness of the public, which only will read what has just been printed. I refer to journalists, who have been appropriately so-called. In other words, it would be "day labourer." * * * * * Again, it may be said that there are three kinds of authors. In the first place, there are those who write without thinking. They write from memory, from reminiscences, or even direct from other people's books. This class is the most numerous. In the second, those who think whilst they are writing. They think in order to write; and they are numerous. In the third place, there are those who have thought before they begin to write. They write solely because they have thought; and they are rare. Authors of the second class, who postpone their thinking until they begin to write, are like a sportsman who goes out at random--he is not likely to bring home very much. While the writing of an author of the third, the rare class, is like a chase where the game has been captured beforehand and cooped up in some enclosure from which it is afterwards set free, so many at a time, into another enclosure, where it is not possible for it to escape, and the sportsman has now nothing to do but to aim and fire--that is to say, put his thoughts on paper. This is the kind of sport which yields something. But although the number of those authors who really and seriously think before they write is small, only extremely few of them think about _the subject itself_; the rest think only about the books written on this subject, and what has been said by others upon it, I mean. In order to think, they must have the more direct and powerful incentive of other people's thoughts. These become their next theme, and therefore they always remain under their influence and are never, strictly speaking, original. On the contrary, the former are roused to thought through the _subject itself_, hence their thinking is directed immediately to it. It is only among them that we find the authors whose names become immortal. Let it be understood that I am speaking here of writers of the higher branches of literature, and not of writers on the method of distilling brandy. It is only the writer who takes the material on which he writes direct out of his own head that is worth reading. Book manufacturers, compilers, and the ordinary history writers, and others like them, take their material straight out of books; it passes into their fingers without its having paid transit duty or undergone inspection when it was in their heads, to say nothing of elaboration. (How learned many a man would be if he knew everything that was in his own books!) Hence their talk is often of such a vague nature that one racks one's brains in vain to understand of _what_ they are really thinking. They are not thinking at all. The book from which they copy is sometimes composed in the same way: so that writing of this kind is like a plaster cast of a cast of a cast, and so on, until finally all that is left is a scarcely recognisable outline of the face of Antinous. Therefore, compilations should be read as seldom as possible: it is difficult to avoid them entirely, since compendia, which contain in a small space knowledge that has been collected in the course of several centuries, are included in compilations. No greater mistake can be made than to imagine that what has been written latest is always the more correct; that what is written later on is an improvement on what was written previously; and that every change means progress. Men who think and have correct judgment, and people who treat their subject earnestly, are all exceptions only. Vermin is the rule everywhere in the world: it is always at hand and busily engaged in trying to improve in its own way upon the mature deliberations of the thinkers. So that if a man wishes to improve himself in any subject he must guard against immediately seizing the newest books written upon it, in the assumption that science is always advancing and that the older books have been made use of in the compiling of the new. They have, it is true, been used; but how? The writer often does not thoroughly understand the old books; he will, at the same time, not use their exact words, so that the result is he spoils and bungles what has been said in a much better and clearer way by the old writers; since they wrote from their own lively knowledge of the subject. He often leaves out the best things they have written, their most striking elucidations of the matter, their happiest remarks, because he does not recognise their value or feel how pregnant they are. It is only what is stupid and shallow that appeals to him. An old and excellent book is frequently shelved for new and bad ones; which, written for the sake of money, wear a pretentious air and are much eulogised by the authors' friends. In science, a man who wishes to distinguish himself brings something new to market; this frequently consists in his denouncing some principle that has been previously held as correct, so that he may establish a wrong one of his own. Sometimes his attempt is successful for a short time, when a return is made to the old and correct doctrine. These innovators are serious about nothing else in the world than their own priceless person, and it is this that they wish to make its mark. They bring this quickly about by beginning a paradox; the sterility of their own heads suggests their taking the path of negation; and truths that have long been recognised are now denied--for instance, the vital power, the sympathetic nervous system, _generatio equivoca_, Bichat's distinction between the working of the passions and the working of intelligence, or they return to crass atomism, etc., etc. Hence _the course of science is often retrogressive_. To this class of writers belong also those translators who, besides translating their author, at the same time correct and alter him, a thing that always seems to me impertinent. Write books yourself which are worth translating and leave the books of other people as they are. One should read, if it is possible, the real authors, the founders and discoverers of things, or at any rate the recognised great masters in every branch of learning, and buy second-hand _books_ rather than read their _contents_ in new ones. It is true that _inventis aliquid addere facile est_, therefore a man, after having studied the principles of his subject, will have to make himself acquainted with the more recent information written upon it. In general, the following rule holds good here as elsewhere, namely: what is new is seldom good; because a good thing is only new for a short time. What the address is to a letter the _title_ should be to a book--that is, its immediate aim should be to bring the book to that part of the public that will be interested in its contents. Therefore, the title should be effective, and since it is essentially short, it should be concise, laconic, pregnant, and if possible express the contents in a word. Therefore a title that is prolix, or means nothing at all, or that is indirect or ambiguous, is bad; so is one that is false and misleading: this last may prepare for the book the same fate as that which awaits a wrongly addressed letter. The worst titles are those that are stolen, such titles that is to say that other books already bear; for in the first place they are a plagiarism, and in the second a most convincing proof of an absolute want of originality. A man who has not enough originality to think out a new title for his book will be much less capable of giving it new contents. Akin to these are those titles which have been imitated, in other words, half stolen; for instance, a long time after I had written "On Will in Nature," Oersted wrote "On Mind in Nature." * * * * * A book can never be anything more than the impression of its author's thoughts. The value of these thoughts lies either in the _matter about which_ he has thought, or in the _form_ in which he develops his matter--that is to say, _what_ he has thought about it. The matter of books is very various, as also are the merits conferred on books on account of their matter. All matter that is the outcome of experience, in other words everything that is founded on fact, whether it be historical or physical, taken by itself and in its widest sense, is included in the term matter. It is the _motif_ that gives its peculiar character to the book, so that a book can be important whoever the author may have been; while with form the peculiar character of a book rests with the author of it. The subjects may be of such a nature as to be accessible and well known to everybody; but the form in which they are expounded, _what_ has been thought about them, gives the book its value, and this depends upon the author. Therefore if a book, from this point of view, is excellent and without a rival, so also is its author. From this it follows that the merit of a writer worth reading is all the greater the less he is dependent on matter--and the better known and worn out this matter, the greater will be his merit. The three great Grecian tragedians, for instance, all worked at the same subject. So that when a book becomes famous one should carefully distinguish whether it is so on account of its matter or its form. Quite ordinary and shallow men are able to produce books of very great importance because of their _matter_, which was accessible to them alone. Take, for instance, books which give descriptions of foreign countries, rare natural phenomena, experiments that have been made, historical events of which they were witnesses, or have spent both time and trouble in inquiring into and specially studying the authorities for them.