"The first publication presented to the English public under the title The Physiognomical System, contained several summary views of different branches of anthropology, which can be appreciated only after having been examined with great attention in all their details. Several chapters required more development, but the volume was already too large. I, therefore, after the second edition was sold, deemed it advisable to publish several chapters as separate works, and to give another arrangement to my English publications. In one volume, I gave an abstract of the anatomy of the brain,?in another, I treated of the deranged manifestations of the mind;?in a third, of the elementary principles of education, and I now publish two volumes on phrenology. In the first, I examine the physiological, and in the second the philosophical part of phrenology. Both these kinds of inquiries are inseparable from each other in the study of mental phenomena. We must first possess positive observations before we are allowed to reason but being acquainted with a sufficient number of facts, we may draw from them philosophical conclusions"--Preface. (PsycINFO Database Record (c) 2009 APA, all rights reserved).
"The most important point in Anthropology, or the study of Man, is to acquire a knowledge of his Nature; and the next, to discover the mode in which his physical and mental constitution may be most advantageously improved. Men of eminent talents have considered the principles of education worthy of their attention; and many works have been already published on this subject. It may therefore be asked, Why should another be presented? Because education is still conducted in a manner very different from that in which it ought to be. Mankind has improved less than we could wish. "There are many books," says Helvetius, "many schools, but few persons of understanding; there are many maxims, but they are seldom applied; man is old, but still a child." New elucidations of this subject, therefore, are still wanting; and I hope I shall be able to suggest some new ideas upon it. As, however, many ancient and modern philosophers have examined this subject, several of my ideas may be found in other writings; but nowhere are they reduced to the principles which I have adopted, and arranged in the same order. I hope also to succeed in pointing out some new objects, interesting in themselves, and leading to important results. This, no doubt, will produce opposition. I am also aware of the active influence of prejudice, of old habits and selfish passions; but nothing shall deter me from communicating what appears to me to be founded on the immutable laws of the Creator. His authority is the only one I acknowledge in natural history. Truth is independent of time; it must prevail, though it excite the hatred of the ignorant, the weak, and the jealous. The reader is requested to bear in mind, that the language in which this treatise is composed, is to the Author a foreign one. A person so situated is not always a competent judge of the nicer shades of meaning attaching to the expressions which he employs; and from this circumstance, together with the difficulty of commanding words to convey his ideas properly, he is liable to be betrayed into a tone of abrupt and apparently authoritative writing, quite foreign to his wish and intention. To these causes the reader is requested to impute any thing in the manner of the following pages, which may appear not suited to the circumstances or the subject"--Preface. (PsycINFO Database Record (c) 2009 APA, all rights reserved).