These general means appear to consist of four distinct principles, which, for want of better definitions, we shall denominate "Reiteration," "Individuation, or Abstraction," "Grouping, or Association," and "Classification, or Analysing."[2]
The first is the act of "Reiteration," of which we have already spoken, as the chief instrument in cultivating the powers of the mind, and without which, we shall also find, there can be no acquisition of knowledge. The second is the principle of "Individuation," by which Nature communicates the knowledge of single ideas, or single objects, by constraining the child to concentrate the powers of its mind upon one object, or idea, till that object or idea is familiar, or, at least, known. The third is the common principle of "Grouping, or Association," and appears to depend, in some degree, on the imaginative powers, by which a child begins to associate objects or truths together, after they have become individually familiar; so that any one of them, when afterwards presented to the mind, enables the pupil at a glance, to command all the others which were originally associated with it. The fourth is the principle of "Classification, or Analysing," by which the mind distributes objects or truths according to their nature,—puts every truth or idea, as it is received, into its proper place, and among objects or ideas of a similar kind. This classification of objects is not, as in the principle of grouping, regulated according to their accidental relation to each other, by which the canary and the cage in which it is confined would be classed together; but according to their nature and character, by which the canary would be classified with birds, and the cage among other articles of household furniture. All knowledge, so far as we are aware, appears to be communicated and retained for use, by means of these four principles; and we shall now proceed to examine the mode in which each of them is employed by Nature for that purpose.
FOOTNOTES:
[2] Note A.
CHAP. IV.
On Nature's Method of communicating Knowledge to the Young
by the Principle of Reiteration.
We have, in a former chapter, endeavoured to describe that particular act of the mind which generally follows simple perception, and by which an idea, when presented to it, is made the subject of active thought, or is "reiterated" again to itself. We have found upon good evidence, that it is by this process, whether simple or complex, that the powers of the mind are cultivated; and we now proceed to shew, that it is by the same act, and by it alone, that any portion of knowledge is ever communicated.[3] No truth, or idea of any kind, can make an effective entrance into the mind, or can find a permanent lodgement in the memory, so as to become "knowledge," until it has successfully undergone this process.
There are two ways by which we usually acquire knowledge:—The one is by observation, without the use of language, and which is common to us with those who are born deaf and dumb; and the other is through the medium of words, either heard or read. In both cases, however, the knowledge retained consists entirely of the several ideas which the objects or the words convey; and what we are now to shew, is, that these ideas thus conveyed, can neither be received by the mind, nor retained by the memory, till they have undergone this process of "reiteration." While, on the contrary, it will be seen that, whenever this process really takes place, the idea thus reiterated does become part of our knowledge, and is, according to circumstances, more or less permanently fixed upon the memory. We shall for this purpose endeavour to trace the operation of the principle, both in the case of ideas communicated by objects without language, and in those conveyed to the mind by means of words.