The force itself which manifests itself, the inner nature of the phenomena which appear in accordance with these laws, remains always a secret to it, something entirely strange and unknown in the case of the simplest as well as of the most complex phenomena.
Indarra bera, kanporatzen dena, lege horren arabera gertatzen diren agerpenen barne-esentzia beti misterio, erabat arrotz eta ezezagun gelditzen zaio, bai agerpen sinpleenean eta bai konplikatuenean.