III. The World as Illusion

Spencer looks at this “old basic problem” from the point of view of natural science. He believed he could show that the developed human being also contributed to his spiritual existence through his own self. This self, is also made up of the inherited traits that had been acquired by our ancestors in their struggle with the external world. If we today believe we see with our eyes our opinions before us, we must remember that they were not always our opinions but that they were once observations that were really made by our eyes in the external world. Spencer's way of thinking, then, is, like that of John Stuart Mill, one that proceeds from psychology. But Mill does not go further than the psychology of the individual. Spencer goes from the individual back to his ancestors. The psychology of the individual is in the same position as the ontogenesis of zoology. Certain phenomena of the history of the individual are explainable only if they are referred back to phenomena of the history of the species. In the same way, the facts of the individual's consciousness cannot be understood if taken alone. We must go back to the species. We must, indeed, go back beyond the human species to acquisitions of knowledge that were accomplished by the animal ancestors of man. Spencer uses his great acumen to support this evolutionary history of the process of cognition. He shows in which way the mental activities have gradually developed from low stages at the beginning, through ever more accurate adaptations of the human mind to the external world and through inheritance of these adaptation. Every insight that the individual human being obtains through pure thought and without experience about things has been obtained by humanity or its ancestors through observation or experience. Leibniz thought he could explain the correspondence of man's inner life with the external world by assuming a harmony between them that was pre-established by the creator. Spencer explains this correspondence in the manner of natural science. The harmony is not pre-established, but gradually developed. We here find the continuation of natural scientific thinking to the highest aspects of human existence. Linnaeus had declared that every living organic form existed because the creator had made it as it is. Darwin maintained that it is as it is because it had gradually developed through adaptation and inheritance. Leibniz declared that thinking is an agreement with the external world because the creator had established this agreement. Spencer maintained that this agreement is there because it has gradually developed through adaptations and inheritance of the thought world.