"First: it perfectly fails us where our ideas fail: it neither does, nor can extend itself farther than they do, and therefore, wherever we have no ideas our reasoning stops, and we are at an end of our reckoning: and if at any time _we reason about words, which do not stand for any ideas_, it is only about those sounds, and nothing else. "Secondly: our reason is often puzzled, and at a loss, because of the obscurity, confusion or imperfection of the ideas it is employed about; and there we are involved in difficulties and contradictions. Thus, not having any perfect idea of the least extension of matter, nor of infinity, we are at a loss about the divisibility of matter; _but having perfect, clear, and distinct ideas of number, our reason meets with none of those inextricable difficulties in numbers, nor finds itself involved in any contradictions about them_."--_Works. 4to, vol. i, p. 431._ It can scarcely be necessary, longer to fatigue the patience of the reader, by reverting to the etymology of those terms, which have been considered as significant of mind and its operations. Every one will be able sufficiently to develope imagination, reflection, combination, [as applied to ideas, importing the amalgamation of _two_ into one] abstraction, [_vide Mr. Tooke, from p. 15 to 426, vol. ii._] and a variety of others; and to shew, that they have arisen from physical objects, and the circumstances which surround us, and are independant of any operation which mind has elaborated. But as madness, by some, has been exclusively held to be a disease of the imagination, and by others, to be a defect of the judgment; considering these as separate and independant powers or faculties of the intellect; it is certainly worth the trouble to enquire, whether such states of mind did ever exist as original and unconnected disorders. With respect to imagination, there can be but little difficulty; yet this will so far involve the judgment and memory, that it will not be easy to institute a distinction. If a cobbler should suppose himself an emperor, this supposition, may be termed an elevated flight, or an extensive stretch of imagination, but it is likewise a great defect in his judgment, to deem himself that which he is not, and it is certainly an equal lapse of his recollection, to forget what he really is.