It is worth noting that, were it for nervous invalids alone, or those who from various causes find it difficult to sleep, or apply the mind to work, this book would be of unquestionable value. In fact, even while writing this chapter, a lady has called to thank me for the substantial benefit which she derived from my advice in this respect. And, mindful of the fact that Attention and Unwearied Perseverance are most necessary to succeed in such processes as are here described, I have taken pains to show or explain how they may be rendered more attractive, tolerable, and habitual to the fickle or light-minded; this, too, being a subject which has been very little considered from a practical point of view. But, above all things, I beg the reader, laying aside all prejudice or preconceived opinion, and neither believing nor disbelieving what he reads, to simply _try it_--that is to test it in his own person to what degree he can influence his will, or bring about subsequent states of mind, by the very easy processes laid down. If I could hope that all opinion of my book would be uttered only by those who had thus put it to the test, I should be well assured as to its future. And also I beg all readers, and especially reviewers, to note that I advise that the auto-suggestive process, by aid of sleep, _shall be discontinued as soon as the experimenter begins to feel an increase in the power of the will_; the whole object of the system being to acquire a perfectly free clear Will as soon as possible. Great injustice was done, as regards the first edition of this work, by a very careless though eminent critic, who blamed the author for not having done what the latter had carefully recommended in his book. There are four stages of advance towards the truth: firstly, Disbelief; secondly, Doubt, which is, in fact, only a fond advance towards Disbelief; thirdly, Agnosticism, which is Doubt mingled with Inquiry; and, finally, pure and simple Inquiry or Search, without any preconceived opinion or feeling whatever. It is, I trust, only in the spirit of the latter, that I have written; therefore I say to the reader, Neither, believe nor disbelieve in anything which I have said, but, as it is an easy thing to try, experiment for yourself, and judge by the result. In fact, as a satisfactory and conclusive experiment will not require more time, and certainly not half the pains which most people would expend on reading a book, I shall be perfectly satisfied if any or all my critics will do so, and judge the system by the result. INTRODUCTION. "Unto many Fortune comes while sleeping."--_Latin Proverb_. "Few know what is really going on in the world."-- _American Proverb_.