When we have a Sensation, we are not said, in the ordinary use of the word, to Conceive. If burned with the candle, I do not say, "I conceive the pain;" I do not say, if I smelt putrescence, that "I conceive the stench." It even seems to be not without a sort of impropriety, if the term is ever applied to mark a simple Idea. We should not, in ordinary language, say, "I conceive red," "I conceive green." We say, however, "I conceive a horse," "I conceive a tree,"; I conceive a ship;" we say also, "I conceive an {234} argument," "I conceive a plan." In these examples, which may be taken as a sufficient specimen of the manner in which the term Conception is used, we see that it is applied exclusively to cases of the secondary feelings; to the Idea, not the Sensation; and to the case of compound, not of single ideas. With this use, the etymology of the word very accurately corresponds: I conceive, that is, _I take together_, a horse; that is, the several ideas, combined under the name horse, and constituting a compound idea. The term conception, we have seen, applies not only to those combinations of ideas, which we call the ideas of external objects, but to those combinations which the mind makes for its own purposes. It thus appears, that the word CONCEPTION is a _generical_ name, like CONSCIOUSNESS; but less comprehensive. We call ourselves conscious, when we have any sensation, or any idea. We say that we conceive, only when we have some complex idea. It remains to be inquired, whether by saying we conceive, or have a conception, we mean any thing whatsoever beside having an idea. If I say, I have the idea of a horse, I can explain distinctly what I mean. I have the ideas of the sensations of sight, of touch, of hearing, of smelling, with which the body and actions of a horse have impressed me; these ideas, all combined, and so closely, that their existence appears simultaneous, and one. This is my IDEA of a horse. If I say, I have a CONCEPTION of a horse, and am asked to explain what I mean, I give the same account exactly, and I can give no other. My CONCEPTION of the horse, is merely my taking together, in one, the simple ideas of the {235} sensations which constitute my knowledge of the horse; and my IDEA of the horse is the same thing.