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"I have often observed, to my regret, that a widespread prejudice exists with regard to the educability of intelligence. The familiar proverb, "When one is stupid, it is for a long time," seems to be a…"

"It seems to us that in intelligence there is a fundamental faculty, the alteration or the lack of which, is of the utmost importance for practical life. This faculty is judgment, otherwise called good…"

"I believe it has required a long series of accepted observations for us to have arrived at this idea, now so natural in appearance, that the modifications produced within our nervous system are the on…"

"Never!" What a strong word! A few modern philosophers seem to lend their moral approval to these deplorable verdicts when they assert that an individual's intelligence is a fixed quantity, a quantity …"

"This observation might be repeated with regard to all objects of the outer world which enter into relation with us. Whether the knowledge of them be of the common-place or of a scientific order matter…"

"It seems to me that people of talent and of genius serve better than average examples for making us understand the laws of character, because they present more extreme traits."

"The world is but an assembly of present, past, and possible sensations; the affair of science is to analyze and co-ordinate them by separating their accidental from their constant relations."

"The mechanical conception of the universe is nothing but naïve realism."

"Since we seek to know what is the physical phenomenon we perceive, we must first enunciate this proposition, which will govern the whole of our discussion: to wit— Of the outer world we know nothing e…"

"Mere numbers cannot bring out... the intimate essence of the experiment. This conviction comes naturally when one watches a subject at work ... What things can happen! What reflections, what remarks, …"

"We are, for the rest, so wrapped up in sensations that none of our boldest conceptions can break through the circle."

"This test thought out and proposed by Professor Ebbinghaus of Berlin, varies in significance according to its mode of use. It consists essentially in this: a word of a text is omitted and the subject …"

"Thoughts have some characteristics of fancy, of freedom, even of unreality, which are wanting to the prosaicness of heavy material things. Thoughts sport with the relations of time and space; they fly…"

"When making the analysis of matter we impliedly admitted two propositions: first, that sensation is the tertium quid which is interposed between the excitant of our sensory nerves and ourselves; secon…"

"Mind and matter brought down to the essential, to the consciousness and its object, form a natural whole, and the difficulty does not consist in uniting but in separating them."

"I wish that people would be persuaded that psychological experiments, especially those on the complex functions, are not improved ; the statistical method gives only mediocre results; some recent exam…"

"Before explaining these methods let us recall exactly the conditions of the problem which we are attempting to solve. Our purpose is to be able to measure the intellectual capacity of a child who is b…"

"Comprehension, inventiveness, direction, and criticism: intelligence is contained in these four words."

"It is necessary to protect oneself from over exaggeration; one must not suppose that there exists, even in the realm of partial memory, an absolutely pure auditory type; real life does not make such s…"