Boris Sidis,
The Foundations of Normal and Abnormal Psychology…
(1914
| notes)
“ The brain and mind of the ancient German differed in nothing from his modern descendant, the German philosopher, and still what a difference in the manifestation of mental energy! The savage brain and mind do not differ from those of their civilized descendants, and still what an ocean of mental life separates the civilized man from his savage progenitor! ”
