In the criticisms heretofore made, some points, held in common by the three writers named early in this work, have been, it may be, passed over unnoticed. This was done, because, being held in common, it was believed that an examination of them, as presented by the latest writer, would be most satisfactory. Therefore, what was peculiar in thought or expression to Sir Wm. Hamilton or Mr. Mansel, we have intended to notice when speaking of those writers. But where Mr. Spencer seems to present their very thought as his own, it has appeared better to remark upon it in his latest form of expression. Mr. Spencer also holds views peculiar to himself. These we shall examine in their place. And for convenience' sake, what we have to say will take the form of a running commentary upon those chapters entitled, "Ultimate Religious Ideas," "Ultimate Scientific Ideas," "The Relativity of all Knowledge," and "The Reconciliation." Before entering upon this, however, some general remarks will be pertinent. 1. Like his teachers, Mr. Spencer believes that the Understanding is the highest faculty of the human intellect. This is implied in the following sentence: "Those imbecilities of the understanding that disclose themselves when we try to answer the highest questions of objective science, subjective science proves to be necessitated by the laws of that understanding."--_First Principles_, p. 98. His illustrations, also, are all, or nearly all, taken from sensuous objects. In speaking of the Universe, evidently the _material_ Universe is present to his mind. His questions refer to objects of sense, and he shows plainly enough that any attempt to answer them by the Sense or Understanding is futile. Hence he concludes that they cannot be answered. But those who "know of a surety," that man is more than an animal nature, containing a Sense and an Understanding; that he is also a spiritual person, having an _Eye_, the pure Reason, which can _see_ straight to the central Truth, with a clearness and in a light which dims and pales the noonday sun, know also that, and how, these difficulties, insoluble to the lower faculties, are, in this noble alembic, finally dissolved.