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"On the one hand, there are individual actions such as throwing, pushing, touching, rubbing. It is these individual actions that give rise most of the time to abstraction from objects."
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"Time interval is a strange and contradictory matter in the mind. It would be reasonable to suppose that a routine time or an eventless time would seem interminable. It should be so, but it is not. It is the dull eventless times that have no duration whatever. A time splashed with interest, wounded with tragedy, crevassed with joy - that's the time that seems long in the memory. And this is right when you think about it. Eventlessness has no posts to drape duration on. From nothing to nothing is no time at all."

"Opinion is like a pendulum and obeys the same law. If it goes past the centre of gravity on one side, it must go a like distance on the other; and it is only after a certain time that it finds the true point at which it can remain at rest."

"I'm proud of being part Cherokee, and I think it's time all us Indians felt the same way."

"Time is like money, the less we have of it to spare the further we make it go."
Explore more quotes by Jean Piaget


"The first type of abstraction from objects I shall refer to as simple abstraction, but the second type I shall call reflective abstraction, using this term in a double sense."


"The principle goal of education in the schools should be creating men and women who are capable of doing new things, not simply repeating what other generations have done."


"Knowing reality means constructing systems of transformations that correspond, more or less adequately, to reality."


"In genetic epistemology, as in developmental psychology, too, there is never an absolute beginning."


"Reflective abstraction, however, is based not on individual actions but on coordinated actions."


"It is with children that we have the best chance of studying the development of logical knowledge, mathematical knowledge, physical knowledge, and so forth."


"Scientific knowledge is in perpetual evolution; it finds itself changed from one day to the next."


"Our problem, from the point of view of psychology and from the point of view of genetic epistemology, is to explain how the transition is made from a lower level of knowledge to a level that is judged to be higher."


"To express the same idea in still another way, I think that human knowledge is essentially active."
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