§ II.—Analysis of Intellectual Powers.
Sense-perception.—Observing closely the intellectual operations of the mind, we find a large class of them relating to objects within the sphere of sense, external objects, as perceived by the senses. The mind, through the medium of sense, takes direct cognizance of these objects. This class of operations we may call Sense-perception, and the faculty thus employed, in distinction from other leading divisions of the intellectual powers, we may call Sense, or the Presentative faculty. Its distinctive office is to present to the mind, through the senses, objects external, sensible, as now and here present.
The Representative Power.—But the mind not only receives impressions of external objects, as present, and acting on the organs of sense; it has also the faculty of conceiving of them in their absence, and representing them to itself. This faculty, as distinguished from the receptive power, or sense, we may call the Representative Power.
Mental Reproduction, and mental Recognition as distinguished.—This power operates in various forms. There may be the simple representation of the absent object, without reference to the act of former perception, as when I think of the Strasburg tower, without recalling any particular instance of its perception. Or there may be such recalling of the former act and instance of perception. The thought of the tower, as it presents itself to my mind, may stand connected definitely with the idea of the time, and place, and attending circumstances in which, on some occasion, I saw that object. It is then recognized as the object which was seen at such or such a time. The former is an instance of mental reproduction simply—the latter, of mental recognition. We have in common language but one name for the two—although the term mare strictly belongs only to the latter—and that is, Memory.
Representation of the Ideal in distinction from the Actual.—Again, unlike either of these, there may be a conception and representation of the object, not at all as it is in reality, and as it was perceived, but varied in essential particulars, to suit our own taste and fancy—a tower not of ordinary stone, but of some rare and costly marble—not of ordinary height, but reaching to the skies, etc., etc. In the former cases we conceived only of the actual, now of the ideal. This faculty is called Imagination. Both are forms of the representative power, not presenting, but only representing objects.
Conception of the Abstract.—The Discursive or Reflective Power.—In the cases thus far described we have conceived of some sensible object, considered in and by itself, capable of being represented to thought. We may, however, conceive not of an object in itself considered, but of the properties and relations of objects in the abstract. Thus we compare and class together those objects which we perceive to possess certain properties in common; as books bound in cloth, or in leather, octavos, or duodecimos. In so doing we exercise the faculty of generalization, which involves comparison, and also what is usually termed abstraction. Or we may reverse the process, and instead of classing together objects possessing certain elements in common, we may analyze a complex idea, or a comprehensive term, in order to derive from it whatever is specifically included in it. Thus from the general proposition, "All men are mortal," inasmuch as the term "all men" includes Socrates, I infer that Socrates is mortal. The process last named is called reasoning.
In either case, both in the synthetic and the analytic process now described, we are dealing not with the concrete but the abstract. The properties and relations of things, rather than things themselves, are the objects of our thoughts. Still they are the properties and relations primarily of sensible objects, and of these objects as conceived, and not as presented to sense. To distinguish this class of conceptions from those previously considered, and also from that presently to be noticed, we may designate this power of the mind as the Discursive or Reflective Power. Its results are notions of the understanding rather than impressions of sense, or ideas of reason.
Conceptions not furnished by Sense.—The Intuitive Power.—We have considered thus far those intellectual operations which fall within three leading departments of mental activity;—the Presentative, Representative, and Discursive Powers. These operations all have reference directly or indirectly to sensible objects. The first regards them as present; the second represents them as absent; the third considers their properties and relations in the abstract.
But the mind has also the faculty of forming ideas and conceptions not furnished by the senses. It departs from the sphere of sense, and deals with the super-sensible, with those primary ideas and first principles presupposed in all knowledge of the sensible. Such are the ideas of time, space, cause, the right, the beautiful. These are suggested by the objects of sense, but not directly derived from nor given by those objects. They are ideas of reason, rather than notions of understanding. They are awakened in the mind on occasions of sensible perception, but not conveyed to the mind through the senses, as in perception, nor directly derived from the object as in the case of the representative and discursive powers. This faculty we may call the Originative or Intuitive Power, in distinction from those previously considered.
Summary of leading Divisions.—We have then four grand divisions of intellectual operations, under which the several specific faculties arrange themselves; viz., the Presentative, the Representative, the Discursive, and the Originative or Intuitive faculty. The first has to do with sensible objects, as present; the second has to do with the same class of objects as absent; the third deals with their abstract properties and relations; and the fourth has to do not with the sensible, in any form, but with the super-sensible.