ture. Thus we seem to be acquainted 

 with the properties of the aggregate 

 forms of that substance which is cogni- 

 zable to the eye and touch, and which 

 we then call matter; we seem to be As- 

 sured of the existence, and to know some- 

 thing of the properties, of a subtile sub- 

 stance which pervades all nature ; and if 

 we are allowed to know any thing, we 

 surely may be admitted to know the 

 properties of our own minds. 



How diversified are our perceptions, 

 how admirably are they adapted to our 

 wants and gratifications! for all beauty 

 of prospect, all melody of sound, all va- 

 riety of odour, must by the eye of reason 

 be perceived to result from the masses 

 or molecules of surrounding matter, being 

 in various states of motion or of rest; 

 of which circumstances we have notice 

 by the actions they induce in our ner- 



