Intelligence is what you use when you don't know what to do.

Jean Piaget

 

What we see changes what we know. What we know changes what we see.

Jean Piaget

 

So we must start from this dual nature of intelligence as something both biological and logical.
Jean Piaget

 

Every psychological explanation comes sooner or later to lean either on biology or on logic (or on sociology, but this in turn leads to the same alternatives).
Jean Piaget

 

Logical positivists have never taken psychology into account in their epistemology, but they affirm that logical beings and mathematical beings are nothing but linguistic structures

Jean Piaget

 

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

Jean Piaget

 

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

Jean Piaget

 

Every response, whether it be an act directed towards the outside world or an act internalized as thought, takes the form of an adaptation or, better, of a re-adaptation.
Jean Piaget

 

The individual acts only if he experiences a need, i.e., if the equilibrium between the environment and the organism is momentarily upset, and action tends to re-establish the equilibrium, i.e., to re-adapt the organism
Jean Piaget

 

A response is thus a particular case of interaction between the external world and the subject, but unlike physiological interactions, which are of a material nature and involve an internal change in the bodies which are present, the responses studied by psychology are of a functional nature and are achieved at greater and greater distances in space (perception, etc.) and in time (memory, etc.) besides following more and more complex paths (reversals, detours, etc.).
Jean Piaget

 

We shall adopt an analogous formula, with the reservation that feelings and cognitive configurations do not depend solely on the existing field, but also on the whole previous history of the acting subject.
Jean Piaget

 

 

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