Even the brain, that most delicate and complex of all known organs, is not merely a lot of neurons added together. While a genius must have more of the gray matter than a sparrow, the idiot may have just as much as the genius. The difference between them must be explained in terms of how those substances are organized.

p. 32: Partly cited in: David Rock, Linda J. Page (2009) Coaching with the Brain in Mind: Foundations for Practice. - Introduction to Systems Philosophy (1972)