AND ITS SELF-CONSERVATION. 85 



going conception of matter as force which necessarily so 

 unfolds itself as to present everywhere two primary and 

 complementary aspects rendering matter fluid through- 

 out its whole extent, and at the same time specializing it 

 into more or less complex and distinct, but still more or 

 less unstable, concrete masses. As is well known, the 

 densest mass still retains the character of fluidity. And 

 this must be true of the minutest (i atom" no less than of 

 directly perceptible masses. 



