454 INTRODUCTION TO PHILOSOPHY OF SCIENCE 



be presumed, by virtue of the nature of its method, to lose 

 the significant features of things. In a word, because science 

 fails to reveal mobility in a realm where it is known to be 

 present, this method cannot be expected to reveal mobility 

 in a realm where it is not known to be present; hence reality 

 as a whole may be presumed to exhibit mobility. 



The inferred realm is thus defined essentially in terms of 

 mobility and evolution. " Not things made, but things in the 

 making, not seK-maintaining states, but only changing states, 

 exist. Rest is never more than apparent, or, rather, relative. 

 The consciousness we have of our own self in its continual 

 flux introduces us to the interior of a reality, on the model of 

 which we must represent other realities. All reality, there- 

 fore, is tendency, if we agree to mean by tendency an incipient 

 change of direction." x Reality is duration, but duration which 

 is lived and not symbolized. "We can, no doubt, by an effort 

 of imagination, solidify duration once it has elapsed, divide 

 it into juxtaposed portions and count all these portions, yet 

 this operation is accomplished on the frozen memory of the 

 duration, on the stationary trace which the mobility of dura- 

 tion leaves behind it, and not on the duration itself." 2 This 

 reveals duration only as a multiplicity. "On the contrary, 

 when I replace myself in duration by an effort of intuition, I 

 immediately perceive how it is unity, multiplicity, and many 

 other things besides." 3 "Inner duration is the continuous 

 life of a memory which prolongs the past into the present. 

 . . . Without this survival of the past into the present there 

 would be no duration, but only instantaneity." 4 Reality is 

 thus a growing and evolving entity, characterized essentially 

 by motion, change, and emergence. Time is its most signif- 

 icant property. Its present is to be understood only in terms 

 of the past out of which it is passing, and the future into 

 which it is merging. It is not being, but becoming. 



The essential similarity between the position of Rergson 

 and that of Eddington is obvious. Roth argue that symbols 

 are incompetent to portray the significant aspects of the 



1 Ibid., p. 65. - Ibid., p. 22. 3 Ibid., p. 23. 4 Ibid., pp. 44-45. 



