exist in the regulation of matter and mind, in the 
promotion of physical and moral enjoyment, and endeavors to conform 
to them in all his thoughts and actions. 
From this apparent digression you will at once discover our object. We 
must not endeavor to change the principles of language, but to 
understand and explain them; to ascertain, as far as possible, the actions 
of the mind in obtaining ideas, and the use of language in expressing
them. We may not be able to make our sentiments understood; but if 
they are not, the fault will originate in no obscurity in the facts 
themselves, but in our inability either to understand them or the words 
employed in their expression. Having been in the habit of using words 
with either no meaning or a wrong one, it may be difficult to 
comprehend the subject of which they treat. A man may have a quantity 
of sulphur, charcoal, and nitre, but it is not until he learns their 
properties and combinations that he can make gunpowder. Let us then 
adopt a careful and independent course of reasoning, resolved to 
meddle with nothing we do not understand, and to use no words until 
we know their meaning. 
A complex idea is a combination of several simple ones, as a tree is 
made up of roots, a trunk, branches, twigs, and leaves. And these again 
may be divided into the wood, the bark, the sap, &c. Or we may 
employ the botanical terms, and enumerate its external and internal 
parts and qualities; the whole anatomy and physiology, as well as 
variety and history of trees of that species, and show its characteristic 
distinctions; for the mind receives a different impression on looking at 
a maple, a birch, a poplar, a tamarisk, a sycamore, or hemlock. In this 
way complex ideas are formed, distinct in their parts, but blended in a 
common whole; and, in conformity with the law regulating language, 
words, sounds or signs, are employed to express the complex whole, or 
each distinctive part. The same may be said of all things of like 
character. But this idea I will illustrate more at large before the close of 
this lecture. 
First impressions are produced by a view of material things, as we have 
already seen; and the notion of action is obtained from a knowledge of 
the changes these things undergo. The idea of quality and definition is 
produced by contrast and comparison. Children soon learn the 
difference between a sweet apple and a sour one, a white rose and a red 
one, a hard seat and a soft one, harmonious sounds and those that are 
discordant, a pleasant smell and one that is disagreeable. As the mind 
advances, the application is varied, and they speak of a sweet rose, 
changing from taste and sight to smell, of a sweet song, of a hard apple, 
&c. According to the qualities thus learned, you may talk to them
intelligibly of the sweetness of an apple, the color of a rose, the 
hardness of iron, the harmony of sounds, the smell or scent of things 
which possess that quality. As these agree or disagree with their 
comfort, they will call them good or bad, and speak of the qualities of 
goodness and badness, as if possessed by the thing itself. 
In this apparently indiscriminate use of words, the ideas remain distinct; 
and each sign or object calls them up separately and associates them 
together, till, at length, in the single object is associated all the ideas 
entertained of its size, qualities, relations, and affinities. 
In this manner, after long, persevering toil, principles of thought are 
fixed, and a foundation laid for the whole course of future thinking and 
speaking. The ideas become less simple and distinct. Just as fast as the 
mind advances in the knowledge of things, language keeps pace with 
the ideas, and even goes beyond them, so that in process of time a 
single term will not unfrequently represent a complexity of ideas, one 
of which will signify a whole combination of things. 
On the other hand, there are many instances where the single 
declaration of a fact may convey to the untutored mind, a single 
thought or nearly so, when the better cultivated will take into the 
account the whole process by which it is effected. To illustrate: a man 
killed a deer. Here the boy would see and imagine more than he is yet 
fully able to comprehend. He will see the obvious fact that the man 
levels his musket, the gun goes off with a loud report, and the deer falls 
and dies. How this is all produced he does not understand, but knowing 
the fact he asserts the single truth--the man killed the deer. As the child 
advances, he will learn    
    
		
	
	
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