III. The World as Illusion

Spencer uses the method of natural science in thinking of the process of knowledge. Every organ of a living being has come into existence through the fact that this being has adapted itself to the conditions under which it lives. It belongs to the human conditions of life that man finds his way through the world with the aid of thinking. His organ of knowledge develops through the adaptation of his conceptual life to the conditions of his external life. By making statements concerning things and processes, man adjusts himself to the surrounding world. All truths have come into being through this process of adaptation, and what is acquired in this way can be transmitted through inheritance to the descendants. Those who think that man, through his nature, possesses once and for all a certain disposition toward general truths are wrong. What appears to be such a disposition did not exist at an earlier stage in the ancestors of man, but has been acquired by adaptation and transmitted to the descendants. When some philosophers speak of truths that man does not have to derive from his own individual experience but that are given a priori in his organization, they are right in a certain respect. While it is obvious that such truths are acquired, it must be stressed that they are not acquired by man as an individual but as a species. The individual has inherited the finished product of an ability that has been acquired at an earlier age.