HARLAN T. STETSON 231 



is giving way to a series of vibrations in a hypothetical 

 ether, we have a less satisfactory picture from the 

 point of view of thinking in the concrete, but perhaps 

 a more satisfactory one from the point of view of 

 appreciation of spiritual realities. The new principle 

 of indeterminism, first advanced by Heisenberg in 

 1927, has struck a note of uncertainty in our methods 

 of divining the ultimate nature of matter, and we are 

 beginning to realize as never before that science has 

 its limitations. The very tools of the physicist are 

 beginning to appear entirely too cumbersome to lay 

 bare the innermost secrets of the electron. At best, 

 our most exact measurements are but approximations 

 of the more fundamental laws of science, but tentative 

 assertions of a partial truth. We may well be proud 

 of the achievements of science in adding to our knowl- 

 edge of the universe, and yet we must bear in mind 

 that after all science can give but a one-sided look Into 

 the sum total of human experiences which make up the 

 events In our cosmic scheme. Accurate so far as it goes, 

 science after all can give but a very restricted por- 

 trayal of the thing behind the representation. When 

 the ultimate building blocks of atom are fast becom- 

 ing reduced to an Idea expressed only by a mathe- 

 matical equation, we realize the vehicles of scientific 

 representation are bringing us to the borderland be- 

 tween physics and metaphysics, and just beyond this 

 horizon rise the provinces of philosophy and religion. 



The Inherent difficulties of the conception of time 

 and space will bring any man to the borderland of his 

 thinking ability. We may trace the life history of 

 stars from dull-red giants to white-hot dwarfs, we may 



