III. The World as Illusion
How is man, to use a statement of Goethe, to become acquainted with his relation to himself and to the external world if he wants to eliminate himself completely in the cognitive process? Great as Mill's merits are for finding methods through which man can learn those things that do not depend on him, a view concerning man's relation to himself and of his relation to the external world cannot be obtained by his methods. All these methods are valid only for the special sciences, not, however, for a comprehensive world conception. No observation can teach what spontaneous thinking is; only thinking can experience this in itself. As this thinking can only obtain information concerning its own nature through its own power, it is also the only source that can shed light on the relation between itself and the external world. Mill's method of investigation excludes the possibility of obtaining a world conception because a world conception can be gained only through thinking that is concentrated in itself and thereby succeeds in obtaining an insight into its own relation to the external world. The fact that John Stuart Mill had an aversion to this kind of self-supporting thinking can be well understood from his character. Gladstone said in a letter (compare Gompertz: John Stuart Mill, Vienna, 1889) that in conversation he used to call Mill the “Saint of Rationalism.” A person who practices thinking in this way imposes rigorous demands on thinking and looks for the greatest possible precautionary measures so that it cannot deceive him. He becomes thereby mistrustful with respect to thinking itself. He believes that he will soon stand on insecure ground if he loses hold of external points of support. Uncertainty with regard to all problems that go beyond strictly observational knowledge is a basic trait in Mill's personality. In reading his books we see everywhere that Mill treats such problems as open questions concerning which he does not risk a sure judgment.