influence here. All this will be farther illustrated by what follows under the next proposition.
It follows from the foregoing account of the power of leaving traces and of association, that all the pains from intense heat and cold, wounds, inflammations, &c. will leave a disposition in the nervous system to run into miniature vibrations of the same kind, and that these miniature vibrations will be excited chiefly by the associated circumstances. That is to say, the appearance of the fire, or of a knife, especially in circumstances like to those in which the child was burnt or cut, will raise up in the child’s nervous system painful vibrations of the same kind with, but less in degree than, those which the actual burn or wound occasioned.
By degrees these miniature pains will be transferred upon the words, and other symbols, which denote these and such-like objects and circumstances: however, as the diffusion is greater, the pain transferred from a single cause must become less. But then, since a great variety of particular miniatures are transferred upon each word, since also the words expressing the several pains of feeling, affect each other by various associations, and each of them transfers a miniature of its own miniature upon more general words, &c. it comes to pass at last, that the various verbal and other symbols of the pains of feeling, also of other pains bodily and mental, excite a compound vibration formed from a variety of miniatures, which exceeds ordinary actual pains in strength. These compound vibrations will also have a general resemblance, and particular differences in respect of each other.
It follows therefore a priori, as one may say, and by a synthetic kind of demonstration, that admitting the powers of leaving traces, and of association, compound or mental pains will arise from simple bodily ones by means of words, symbols, and associated circumstances. And they seem to me to answer in kind and degree to the facts in general. If, farther, we admit the doctrine of vibrations, then these compound mental pains will arise from, or be attended by, violent vibrations in the nervous system, and particularly in the brain.
Agreeably to this account, we may observe that the mere words denoting bodily pains, though not formed into propositions or threatenings, affect children. However, since there happen daily associations of the mere words with freedom and security, and of propositions and threatenings with sufferings, children learn by degrees to confine their fear, sorrow, &c. to those things
