Reid wanted a name to express the act of scrutinizing or examining the mind, and to correspond with such names as Perception, Observation, for the study of the extended or object universe. He used Consciousness for this purpose; a word that had been probably more applied to our cognitive energies than to our experience of mere feeling in its simplest manifestation. It is not often that "consciousness" is employed as the popular designation of states of feeling as such, states of marked enjoyment or suffering. On the other hand, the word is frequently made use of to designate the act of cognizing or {228} thinking of our states of feeling; for which, however, self-consciousness is undoubtedly the more proper appellative. Hamilton terms "consciousness" a "condition" of our feelings and mental operations; more correctly it is the operations themselves; the consciousness is not the condition of the feeling, but the feeling itself. More material is the opinion, held by Hamilton in common with most of the German philosophers, that the foundation of all consciousness is knowing; that we feel, only as we know that we feel. He says, "It is evident that every mental phenomenon is either an act of knowledge, or only possible through an act of knowledge: for _consciousness is a knowledge--a phenomenon of cognition_." ("Metaphysics," Lect xi.) Now although we may not be able to rebut this singular assertion by pointing to a state of feeling such as to entirely exclude knowledge, we may ask, do the two properties, said to be thus implicated, rise and fall in steady concomitance; the more the knowledge, the greater the feeling? The answer must be negative. A favourite doctrine of Hamilton, containing a certain amount of truth, affirms an inverse ratio between knowing and feeling; which it is difficult to reconcile with the present doctrine. A new distinction must be laid down between the kind of knowing that constitutes "feeling," and the kind of knowing that constitutes "knowing" in the strict sense of knowledge. We may concede to Hamilton that feeling must always be within reach of a cognitive exertion, but it cannot be conceded that an actual cognitive exertion is essential to the manifestation of the feeling. Such exertion unless kept within narrow limits of intensity cools down instead of promoting the emotional state.