"It is not likely that the history of psychology can be written in the next three centuries without mention of Freud's name and still claim to be a general history of psychology... Perhaps, had Freud been smothered in his cradle, the times would have produced a substitute, It is hard to say. The dynamics of history lack control experiments."

“American psychology inherited its physical body from German experimentalism, but it got its mind from Darwin.”

“Fechner laid down the general outlines of his program in ZendAvesta, the book about heaven and the future life. Imagine sending a graduate student of psychology nowadays to the Divinity School for a course in immortality as preparation for advanced experimental work in psychophysics! How narrow we have become!”

“The historical approach to understanding of scientific fact is what differentiates the scholar in science from the mere experimenter.”

“Introspectionism got its ism because the protesting new schools needed a clear and stable contrasting background against which to exhibit their novel features. No proponent of introspection a the basic method of psychology ever called himself an introspectionist.”

“always seemed to me the nearest approach to genius of anyone with whom I have been closely associated.… He was competent with languages, and could ad lib in Latin when the occasion required it. If you had mushrooms, he would tell you at once how they should be cooked. If you were buying oak for a new floor, he would at once come forward with all the advantages of ash. If you were engaged to be married, he would have his certain and insistent advice about the most unexpected aspects of your problems, and if you were honeymooning, he would write to remind you, as he did me, on what day you ought to be back at work.”

“was troubled by materialism... His philosophical solution of the spiritual problem lat in his affirmation of the identity of the mind and matter and in his assurance that the entire universe can be regarded as readily from the point of view of its consciousness... as it can be viewed as inert matter.”