“Metaphysics means nothing but an unusually obstinate effort to think clearly. The fundamental conceptions of psychology are practically very clear to us, but theoretically they are very confused, and one easily makes the obscurest assumptions in this science without realizing, until challenged, what internal difficulties they involve.”

“Philosophy is "an unusually stubborn attempt to think clearly.”

“Psychology is the science of mental life”

“To suggest personal will and effort to one all sicklied o'er with the sense of irremediable impotence is to suggest the most impossible of things. What he craves is to be consoled in his very powerlessness, to feel that the spirit of the universe recognizes and secures him, all decaying and failing as he is.”

“Science, like life, feeds on its own decay. New facts burst old rules; then newly divined conceptions bind old and new together into a reconciling law.”

“The pragmatic method starts from the postulate that there is no difference of truth that doesn’t make a difference of fact somewhere; and it seeks to determine the meaning of all differences of opinion by making the discussion hinge as soon as possible upon some practical or particular issue.”

“Selection is the very keel on which our mental ship is built. And in this case of memory its utility is obvious. If we remembered everything, we should on most occasions be as ill off as if we remembered nothing.”