General terms are, as it were, but the indorsements upon the bundles of our ideas; they are useful to those who have collected a number of ideas, but utterly useless to those who have no collections ready for classification: nor should we be in a hurry to tie up the bundles, till we are sure that the collection is tolerably complete; the trouble, the difficulty, the shame of untying them late in life, is felt even by superior minds. "Sir," said Dr. Johnson, "I don't like to have any of my opinions attacked. I have made up my faggot, and if you draw out one you weaken the whole bundle."
Preceptors sometimes explain general terms and abstract notions vaguely to their pupils, simply because they are ashamed to make that answer which every sensible person must frequently make to a child's inquiries, "I don't know."[12] Surely it is much better to say at once, "I cannot explain this to you," than to attempt an imperfect or sophistical reply. Fortunately for us, children, if they are not forced to attend to studies for which they have no taste, will not trouble us much with moral and metaphysical questions; their attention will be fully employed upon external objects; intent upon experiments, they will not be very inquisitive about theories. Let us then take care that their simple ideas be accurate, and when these are compounded, their complex notions, their principles, opinions, and tastes, will necessarily be just; their language will then be as accurate as their ideas are distinct; and hence they will be enabled to reason with precision, and to invent with facility. We may observe, that the great difficulty in reasoning is to fix steadily upon our terms; ideas can be readily compared, when the words by which we express them are defined; as in arithmetic and algebra, we can easily solve any problem, when we have precise signs for all the numbers and quantities which are to be considered.
It is not from idleness, it is not from stupidity, it is not from obstinacy, that children frequently show an indisposition to listen to those who attempt to explain things to them. The exertion of attention, which is frequently required from them, is too great for the patience of childhood: the words that are used are so inaccurate in their signification, that they convey to the mind sometimes one idea and sometimes another; we might as well require of them to cast up a sum right whilst we rubbed out and changed the figures every instant, as expect that they should seize a combination of ideas presented to them in variable words. Whoever expects to command the attention of an intelligent child, must be extremely careful in the use of words. If the pupil be paid for the labour of listening by the pleasure of understanding what is said, he will attend, whether it be to his playfellow, or to his tutor, to conversation, or to books. But if he has by fatal experience discovered, that, let him listen ever so intently, he cannot understand, he will spare himself the trouble of fruitless exertion; and, though he may put on a face of attention, his thoughts will wander far from his tutor and his tasks.
"It is impossible to fix the attention of children," exclaims the tutor; "when this boy attends he can do any thing, but he will not attend for a single instant."
Alas! it is in vain to say he will not attend; he cannot.
[7] Some of these lessons, and others by the authors, will shortly be printed, and marked according to this method.
[8] See Priestley's History of Vision, vol. i. p. 51.
[9] "Art de Penser."
[10] See Condillac's Art de Penser. In the chapter "on the use of signs," this young man is mentioned.
[11] Vol. II.