Scientific knowledge is in perpetual evolution it finds itself changed from one day to the next. – Jean Piaget
In other words, knowledge of the external world begins with an immediate utilisation of things, whereas knowledge of self is stopped by this purely practical and utilitarian contact. – 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
This means that no single logic is strong enough to support the total construction of human knowledge. – Jean Piaget