“The concept of substance leads to a materialist aspect of the mind. I speak instead of the spiritual existence of the self without mentioning any 'substance' properties. The great problem is 'how the self controls its brain'. This is dualistic, but not in terms of two substances. Instead it relates to the two worlds of Popper.”

How the Self Controls Its Brain (1994)

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John C. Eccles 12
Australian neurophysioloigst 1903–1997

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p. 49 http://books.google.com/books?id=U6lMnx8AQsYC&q=%22The+meeting+of+two+personalities+is+like+the+contact+of+two+chemical+substances+if+there+is+any+reaction+both+are%22+%22transformed%22&pg=PA49#v=onepage
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