When I say,[30] the Air is fill'd with sound, and that words are received into the ears, as figures of exterior objects are received into the eyes, I mean, the sensitive motions of the Air pattern out sound, and the sensitive motions of the Ears pattern out words, as the sensitive figurative motions of the Eyes pattern out the figures of external objects.
Also when I speak of Thunder and Lightning, to wit, That Thunder makes a great noise by the breaking of lines: My meaning is, That the Air patterns out this sound or noise of the lines; and by reason there are so many patterns made in the air by its sensitive motions, the Ear cannot take so exact a copy thereof, but somewhat confusedly; and this is the reason why Thunder is represented, or rather pattern'd out with some terrour; for Thunder is a confused noise, because the patterns are made confusedly.
But concerning Sound and Light, I am forced to acquaint you, Madam, that my meaning thereof is not so well expressed in my Book of Philosophy, by reason I was not of the same opinion at that time when I did write that Book which I am now of; for upon better consideration, and a more diligent search into the causes of natural effects, I have found it more probable, that all sensitive perception is made by the way of Patterning, and so consequently the perception of Sound and of Light; wherefore, I beseech you, when you find in my mentioned Book any thing thereof otherwise expressed, do not judg of it as if I did contradict my self, but that I have alter'd my opinion since upon more probable reasons.
Thus, Madam, you have a true declaration of my sence and meaning concerning those places, which in my Philosophical Opinions you did note, as being obscure; but I am resolved to bestow so much time and labour as to have all other places in that Book rectified and cleared, which seem not perspicuous, lest its obscurity may be the cause of its being neglected: And I pray God of his mercy to assist me with his Grace, and grant that my Works may find a favourable acceptance. In the mean time, I confess my self infinitely bound to your Ladyship, that you would be pleased to regard so much the Honour of your Friend, and be the chief occasion of it; for which I pray Heaven may bless, prosper, and preserve you, and lend me some means and ways to express my self,
Madam,
Your thankfull Friend,
and humble Servant.
[1] Part. 3. c. 13.
[2] Ibid.
[3] Part. 1. c. 11.