DEATH AND RESURRECTION. 117 



some time directly utilizing the ac- 

 cumulated stores of organic matter; 

 but such periodical interruptions and 

 changes would disturb the continuity 

 of life's evolution. To avoid this, there 

 is no way open to restore equilibrium 

 except the one in which it is now done. 

 No effect, whatever its nature, can 

 exist without cause; and further, every 

 effect must have a sufficient cause. If, 

 therefore, we have established that 

 natural forces can no more produce 

 organisms than steam engines, we have 

 also proved that these things would 

 never have come into existence if the 

 organic forces had been left to them- 

 selves. Neither organisms nor engines 

 would exist, because they have no 

 cause in the material world. The prod- 

 ucts of art are due not only to other 

 causes, but the relationship between 

 cause and effect is also different 

 with them from what it is with the 

 products of nature. Every product of 

 nature has its cause in a previous con- 

 dition of matter. The cause goes be- 



