192 ANTIENT METAPHYSICS. Book III. 



Tigence a:id animation are elTential to his nature. That three diftind 

 fubftances {hould make but One be'nig, appears, I know, to many, an 

 inconceivable myftery. But it will not appear fo to a philofopher, 

 who confiders that the Second Perfon \s potentially^ or virtually con- 

 tained in the Firft, otherwife he could not be produced out of him : 

 And if fo, the Second Perfon muft contain in him the Firft a&ually; 

 and the fame muft be the cafe of the Third Perfon, with refped to 

 the Second. And this is illuftrated by the progrelTion, which Logic 

 teaches us, of the fpecies from the genus ; for the genus virtually 

 contains the fpecies, which is produced out of it, and the fpecies 

 adiually contains the genus. Thus, for example, the genus animal 

 •virtually contains the fpecies tnan^ which otherwife could not be 

 produced out of it : But the fpecies man aSlually contains the genus 

 animal without which we could not conceive man to exift. Now, 

 when things are fo connedted together, that one of them contains 

 the other, and is alfo contained in that other, they are very properly 

 confidered to be fo intimately conneded, as to make but one being: 

 And this is the cafe of every genus, and of all the fpeciefes under it, 

 hov/ever many in number; fo that there we have the many in the one^ 

 and the one in the many. And the only difference betwixt the Tri- 

 nity, and the common cafe of genus and fpecies, is, that the Trinity 

 bei'n'j- limited to the conftituent principles of the univerfe, which 

 are only three^ there is there no more than three in one^ and o?te in 

 three. So that what appears at firft fight to be an incomprehenfible 

 vnyftery, is to be found in the whole fyftem of the univerfe, which 

 is all divided into genufes and fpecies: And, therefore, this dodrine 

 of the Three in One, and the One in Three, however incompre- 

 henfible and paradoxical it may at firft fight appear, is truly a part, 

 and an effential part, of the whole fyftem of the univerfe. 



In this manner is Logic conneded with Theology and the fyftem 

 of the univerfe; to both which, I am perfuaded, a good Logic diredly 



lea lis. 



