It is philosophy book. On the prevailing errors on the mind, proposed to be considered in this paper, some relate to the Feelings, others to the Will. In regard to Mind as a whole, there are still to be found among us some remnants of a mistake, once universally prevalent and deeply rooted, namely, the opinion that mind is not only a different fact from body—which is true, and a vital and fundamental truth —but is to a greater or less extent independent of the body. In former times, the remark seldom occurred to any one, unless obtruded by some extreme instance, that to work the mind is also to work a number of bodily organs; that not a feeling can arise, not a thought can pass, without a set of concurring bodily processes. At the present day, however, this doctrine is very generally preached by men of science. The improved treatment of the insane has been one consequence of its reception. The husbanding of mental power, through a bodily régime, is a no less important application.