The occasion of all their difficulty originated in an attempt to nvestigate the faculties of the mind without any means of getting at it. They did not content themselves with an adoption of the principles which lay at the foundation of all true philosophy, viz., that the facts to be accounted for, do exist; that truth is eternal, and we are to become acquainted with it by the means employed for its development.
They quitted the world of materiality they inhabited, refused to examine the development of mind as the effect of an existing cause; and at one bold push, entered the world of thought, and made the unhallowed attempt to reason, a priori, concerning things which can only be known by their manifestations. But they soon found themselves in a strange land, confused with sights and sounds unknown, in the explanation of which they, of course, choose terms as unintelligible to their readers, as the ideal realities were to them. This course, adopted by Aristotle, has been too closely followed by those who have come after him.[2] But a new era has dawned upon the philosophy of the mind, and a corresponding change in the method of inculcating the principles of language must...