[Editor's footnote 76: The doctrine of this chapter is as just as it is admirably stated. A conception is nothing whatever but a complex idea, and to conceive is to have a complex idea. But as there must always have been some cause why a second name is used when there is already a first, there is generally some difference in the occasions of their employment: and a recognition of this difference is necessary to the completeness of the exposition. It seems to me that conception and to conceive are phrases appropriated to the case in which the thing conceived is supposed to be something external to my own mind. I am not said to conceive my own thoughts; unless it be in the ease of an invention, or mental creation; and even then, to conceive it, means to imagine it realized, so that it may be presented to myself or others as an external object. To conceive something is to understand what it is; to adapt my complex idea to something presented to me objectively. I am asked to conceive an iceberg: it is not enough that I form to myself some complex idea; it must be a complex idea which shall really resemble an iceberg, _i.e._, what is called an iceberg by other people. My complex idea must be made up of the elements in my mind which correspond to the elements making up the idea of an iceberg in theirs. This is connected with one of the most powerful and misleading of the illusions of general language. The purposes of general names would not be answered, unless the complex idea {237} connected with a general name in one person's mind were composed of essentially the same elements as the idea connected with it in the mind of another. There hence arises a natural illusion, making us feel as if, instead of ideas as numerous as minds, and merely resembling one another, there were one idea, independent of individual minds, and to which it is the business of each to learn to make his private idea correspond. This is the Platonic doctrine of Ideas in all its purity: and as half the speculative world are Platonists without knowing it, hence it also is that in the writings of so many psychologists we read of the conception or the concept of so and so; as if there was a concept of a thing or of a class of things, other than the ideas in individual minds--a concept belonging to everybody, the common inheritance of the human race, but independent of any of the particular minds which conceive it. In reality, however, this common concept is but the sum of the elements which it is requisite for the purposes of discourse that people should agree with one another in including in the complex idea which they associate with a class name. As we shall presently see, these are only a part, and often but a small part, of each person's complex idea, but they are the part which it is necessary should be the same in all.--_Ed._] {238} CHAPTER VII. IMAGINATION.