372 ANTIENT METAPHYSICS. Book IV. 



be not principles or caufes, in any fenfe, yet they muft neceflarily have 

 been, otherwife there could have been no fyftem of nature, nor any 

 vifible world. 



In my next Book, according to the method I have propofed, I will 

 proceed to treat of the general principles of Science, and of the nature 

 of Xf uth and Evidence. 



BOOK 



