But hitherto it was not recognised that every kind of active and operating force in nature is essentially identical with will, and therefore the multifarious kinds of phenomena were not seen to be merely different species of the same genus, but were treated as heterogeneous.
Orain arte, ordea, naturan nahimenarekin ahalegindu eta eragiten duten indarretako bakoitzaren esentziaren identitatea ez da berrezagutu eta horregatik askotariko agerpenak, zeinak genero beraren espezie desberdinak baitira, ez ditu halakotzat ikusi, baizik heterogeneo bezala kontsideratu ditu: