Date: January, 1884

"A word about the back-bone of the human mind, the psychological principle of identity, will help us here."

— James, William (1842-1910)

Date: 1890

"All the states of mind which language designates by the metaphors bitter, harsh, sweet, combine themselves, therefore, with the corresponding mimetic movements of the mouth"

— James, William (1842-1910)

Date: 1890

"'The brain secretes thought, as the kidneys secrete urine, or as the liver secretes bile,' are phrases which one sometimes hears."

— James, William (1842-1910)

Date: 1898

"The primary aim of the experimental psychologist has been to analyze the structure of mind; to ravel out the elemental processes from the tangle of consciousness, or (if we may change the metaphor) to isolate the constituents in the given conscious formation. His task is a vivisection"

— Titchener, E. B. (1867-1927)