Although, however, the complex idea I have of an object which never was presented to my senses, is rightly described as an idea of an idea; my remembrance of a complex idea which I have had before, does not seem to me to differ from the remembered idea as an idea differs from a sensation. There is a distinction between my visual idea of Mont Blanc and the actual sight of the mountain, which I do not find between my remembrance of Falstaff and the original impression from which it was derived. My present thought of Falstaff seems to me not a copy but a repetition of the original idea; a repetition which may be dimmed by distance, or which may, on the contrary, be heightened by intermediate processes of thought; may have lost some of its features by lapse of time, and may have acquired others by reference to the original sources; but which resembles the first impression not as the thought of an object resembles the sight of it, but as a second or third sight of an object resembles the first. This question will meet us again in the psychological examination of Memory, the theory of which is in no small degree dependent upon it.--_Ed._] {70} CHAPTER III. THE ASSOCIATION OF IDEAS. "To have a clear view of the phenomena of the mind, as mere affections or states of it, existing successively, and in a certain series, which we are able, therefore, to predict, in consequence of our knowledge of the past, is, I conceive, to have made the most important acquisition which the intellectual inquirer can make." _Brown_, _Lectures_, i. 544. THOUGHT succeeds thought; idea follows idea, incessantly. If our senses are awake, we are continually receiving sensations, of the eye, the ear, the touch, and so forth; but not sensations alone. After sensations, ideas are perpetually excited of sensations formerly received; after those ideas, other ideas: and during the whole of our lives, a series of those two states of consciousness, called sensations, and ideas, is constantly going on. I see a horse: that is a sensation. Immediately I think of his master: that is an idea. The idea of his master makes me think of his office; he is a minister of state: that is another idea. The idea of a minister of state makes me think of public affairs; and I am led into a train of political ideas; when I am summoned to dinner. This is a new sensation, followed by the idea of dinner, and of the company with whom I am to partake it. The sight of the company and of the food are other {71} sensations; these suggest ideas without end; other sensations perpetually intervene, suggesting other ideas: and so the process goes on. In contemplating this train of feelings, of which our lives consist, it first of all strikes the contemplator, as of importance to ascertain, whether they occur casually and irregularly, or according to a certain order.