_The second Form._--But not this alone: I am presently conscious of something beside simple thought. The writer, whose pages I peruse, interests me, excites me; I am amused by his wit, moved by his eloquence, affected by his pathos; I become indignant at the scenes and characters which he portrays, or, on the contrary, they command my admiration. All this by turns passes over me as the fitful shadows play upon the waters, coming and going with the changing cloud. This is not pure thought. It is thought accompanied with another and quite distinct element, that is, _feeling_. This power also I have;--I can feel. _A third Form._--And not this alone. The process does not end here. Thought and feeling lead to action. I resolve what to do. I lay down my book, and go forth to perform some act prompted by the emotion awakened within me. This power also I have;--the faculty of voluntary action, or volition. _These three Forms comprehensive._--Here, then, are three grand divisions or forms of mental activity--thought, feeling, volition. These powers we are constantly exerting. Every moment of my intelligent existence I am exercising one or another, or all of these faculties. And, what is more, of all the forms of mental activity, there is not one which does not fall under one or another of these three divisions--thought--feeling--volition. Every possible mental operation may be reduced to one of these three things. * * * * * We have, then, these grand departments or modes of mental activity, comprehensive of all others: Intellect, or the faculty of simple thought; Sensibility, or the faculty of feeling; Will, or the faculty of voluntary action. Under these leading powers are comprehended subordinate modes of mental activity, known as faculties of the Intellect, or of the Sensibility, or of the Will. We have at present to do only with those of the Intellect. § 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.