actually given of the opinions of the time, and presumably of the reader, there may be added as many more which are anticipated and imaginary. That, then, which is really only misunderstanding, must take the form of active disapproval, and it is all the more difficult to recognise that it is misunderstanding, because although the laboriously-attained clearness of the explanation and distinctness of the expression never leaves the immediate sense of what is said doubtful, it cannot at the same time express its relations to all that remains to be said. Therefore, as we have said, the first perusal demands patience, founded on confidence that on a second perusal much, or all, will appear in an entirely different light. Further, the earnest endeavour to be more completely and even more easily comprehended in the case of a very difficult subject, must justify occasional repetition. Indeed the structure of the whole, which is organic, not a mere chain, makes it necessary sometimes to touch on the same point twice. Moreover this construction, and the very close connection of all the parts, has not left open to me the division into chapters and paragraphs which I should otherwise have regarded as very important, but has obliged me to rest satisfied with four principal divisions, as it were four aspects of one thought. In each of these four books it is especially important to guard against losing sight, in the details which must necessarily be discussed, of the principal thought to which they belong, and the progress of the whole exposition. I have thus expressed the first, and like those which follow, unavoidable demand upon the reader, who holds the philosopher in small favour just because he himself is a philosopher.
The second demand is this, that the introduction be
