II. "I shall at present describe the operations of a single ant that I observed sufficiently long to satisfy my curiosity. One rainy day, I observed a labourer digging the ground near the aperture which gave entrance to the ant-hill. It placed in a heap the several fragments it had scraped up, and formed them into small pellets, which it deposited here and there upon the nest. It returned constantly to the same place, and appeared to have a marked design, for it laboured with ardour and perseverance. I remarked a slight furrow, excavated in the ground in a straight line, representing the plan of a path or gallery. The Labourer, the whole of whose movements fell under my immediate observation, gave it greater depth and breadth, and cleared out its borders: and I saw at length, in which I could not be deceived, that it had the intention of establishing an avenue which was to lead from one of the stories to the underground chambers. This path, which was about two or three inches in length, and formed by a single ant, was opened above and bordered on each side by a buttress of earth; its concavity en forme de gouttière was of the most perfect regularity, for the architect had not left an atom too much. The work of this ant was so well followed and understood, that I could almost to a certainty guess its next proceeding, and the very fragment it was about to remove. At the side of the opening where this path terminated, was a second opening to which it was necessary to arrive by some road. The same ant engaged in and executed alone this undertaking. It furrowed out and opened another path, parallel to the first, leaving between each a little wall of three or four lines in height. Those ants who lay the foundation of a wall, chamber, or gallery, from working separately, occasion now and then a want of coincidence in the parts of the same or different objects. Such examples are of no unfrequent occurrence, but they by no means embarrass them. What follows proves that the workman, on discovering his error, knew how to rectify it. A wall had been erected with the view of sustaining a vaulted ceiling, still incomplete, that had been projected from the wall of the opposite chamber. The workman who began constructing it, had given it too little elevation to meet the opposite partition upon which it was to rest. Had it been continued on the original plan, it must infallibly have met the wall at about one half of its height, and this it was necessary to avoid. This state of things very forcibly claimed my attention, when one of the ants arriving at the place, and visiting the works, appeared to be struck by the difficulty which presented itself; but this it as soon obviated, by taking down the ceiling and raising the wall upon which it reposed. It then, in my presence, constructed a new ceiling with the fragments of the former one."—Hüber's Natural History of Ants, p. 38-41.

Now I assert, that the faculty manifested in the acts here narrated does not differ in kind from Understanding, and that it does so differ from Reason. What I conceive the former to be, physiologically considered, will be shown hereafter. In this place I take the understanding as it exists in men, and in exclusive reference to its intelligential functions; and it is in this sense of the word that I am to prove the necessity of contra-distinguishing it from reason.

Premising then, that two or more subjects having the same essential characters are said to fall under the same general definition, I lay it down, as a self-evident truth,—(it is, in fact, an identical proposition) that whatever subjects fall under one and the same general definition are of one and the same kind: consequently, that which does not fall under this definition, must differ in kind from each and all of those that do. Difference in degree does indeed suppose sameness in kind; and difference in kind precludes distinction from difference of degree. Heterogenea non comparari, ergo nec distingui, possunt. The inattention to this rule gives rise to the numerous sophisms comprised by Aristotle under the head of μεταβασισ εις αλλο γενος, that is, transition into a new kind, or the falsely applying to X what had been truly asserted of A, and might have been true of X, had it differed from A in its degree only. The sophistry consists in the omission to notice what not being noticed will be supposed not to exist; and where the silence respecting the difference in kind is tantamount to an assertion that the difference is merely in degree. But the fraud is especially gross, where the heterogeneous subject, thus clandestinely slipt in, is in its own nature insusceptible of degree: such as, for instance, Certainty, or Circularity, contrasted with Strength, or Magnitude.

To apply these remarks for our present purpose, we have only to describe Understanding and Reason, each by its characteristic qualities. The comparison will show the difference.

UNDERSTANDING.REASON.
1. Understanding is discursive.1. Reason is fixed.
2. The Understanding in all its judgments refers to some other Faculty as its ultimate Authority.2. The Reason in all its decisions appeals to itself, as the ground and substance of their truth. (Hebrews vi. 13.)
3. Understanding is the Faculty of Reflection.3. Reason of Contemplation. Reason indeed is much nearer to Sense than to Understanding: for Reason (says our great Hooker) is a direct aspect of Truth, an inward Beholding, having a similar relation to the Intelligible or Spiritual, as sense has to the Material or Phenomenal.

The Result is: that neither falls under the definition of the other. They differ in kind: and had my object been confined to the establishment of this fact, the preceding columns would have superseded all further disquisition. But I have ever in view the especial interest of my youthful readers, whose reflective power is to be cultivated, as well as their particular reflections to be called forth and guided. Now the main chance of their reflecting on religious subjects aright, and of their attaining to the contemplation of spiritual truths at all, rests on their insight into the nature of this disparity still more than on their conviction of its existence. I now, therefore, proceed to a brief analysis of the Understanding, in elucidation of the definitions already given.

The Understanding then (considered exclusively as an organ of human intelligence,) is the faculty by which we reflect and generalize. Take, for instance, any objects consisting of many parts, a house, or a group of houses: and if it be contemplated, as a Whole, that is, as many constituting a one, it forms what in the technical language of Psychology, is called a total impression. Among the various component parts of this, we direct our attention especially to such as we recollect to have noticed in other total impressions. Then, by a voluntary act, we withhold our attention from all the rest to reflect exclusively on these; and these we henceforward use as common characters, by virtue of which the several objects are referred to one and the same sort.[95] Thus, the whole process may be reduced to three acts, all depending on and supposing a previous impression on the senses: first, the appropriation of our Attention; second, (and in order to the continuance of the first) Abstraction, or the voluntary withholding of the Attention; and third, Generalization. And these are the proper Functions of the Understanding: and the power of so doing, is what we mean, when we say we possess Understanding, or are created with the faculty of Understanding.

[It is obvious, that the third function includes the act of comparing one object with another. In a note (for, not to interrupt the argument, I avail myself of this most useful contrivance,) I have shown, that the act of comparing supposes in the comparing faculty, certain inherent forms, that is, modes of reflecting not referable to the objects reflected on, but pre-determined by the constitution and (as it were) mechanism of the Understanding itself. And under some one or other of these forms,[96] the resemblances and differences must be subsumed in order to be conceivable, and a fortiori therefore in order to be comparable. The senses do not compare, but merely furnish the materials for comparison. But this the reader will find explained in the note; and will now cast his eye back to the sentence immediately preceding this parenthesis.]

Now when a person speaking to us of any particular Object or Appearance refers it by means of some common character to a known class (which he does in giving it a Name), we say, that we understand him; that is, we understand his words. The Name of a thing, in the original sense of the word Name, (nomen, νουμενον, το intelligible, id quod intelligitur) expresses that which is understood in an appearance, that which we place (or make to stand) under it, as the condition of its real existence, and in proof that it is not an accident of the senses, or affection of the individual, not a phantom or apparition, that is, an appearance that is only an appearance. (See Gen. ii. 19 20, and in Psalm xx. 1, and in many other places of the Bible, the identity of nomen with numen, that is, invisible power and presence, the nomen substantivum of all real objects, and the ground of their reality, independently of the affections of sense in the percipient). In like manner, in a connected succession of names, as the speaker passes from the one to the other, we say that we can understand his discourse (discursio intellectûs, discursus, his passing rapidly from one thing to another). Thus, in all instances, it is words, names, or, if images, yet images used as words or names, that are the only and exclusive subjects of Understanding. In no instance do we understand a thing in itself; but only the name to which it is referred. Sometimes indeed, when several classes are recalled conjointly, we identify the words with the object—though by courtesy of idiom rather than in strict propriety of language. Thus we may say that we understand a rainbow, when recalling successively the several Names for the several sorts of colours, we know that they are to be applied to one and the same phenomenon, at once distinctly and simultaneously; but even in common speech we should not say this of a single colour. No one would say he understands red or blue. He sees the colour, and had seen it before in a vast number and variety of objects; and he understands the word red, as referring his fancy or memory to this his collective experience.

If this be so, and so it most assuredly is—if the proper functions of the Understanding be that of generalizing the notices received from the senses in order to the construction of names: of referring particular notices (that is, impressions or sensations) to their proper names; and, vice versâ, names to their correspondent class or kind of notices—then it follows of necessity, that the Understanding is truly and accurately defined in the words of Leighton and Kant, a "faculty judging according to sense."