Lecture X
Du Bois-Reymond,[^1] the physiologist who gave that famous lecture on the limits of natural science, once said: “It is utterly beyond us to grasp the human being as he is in waking life.” Well, we know what to think of such a statement. Du Bois-Reymond believes, however, that it is possible for us to grasp the sleeping human being. According to him, the laws and relationship of the physical world outside, which we are able to grasp, also pertain to the sleeping human being, only in a more complex fashion. We know this to be incorrect, but let us merely consider the statement, which is, that we can have scientific understanding of the sleeping human being, but not of the waking human being.
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