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 PiagetTo express the same idea in still another way, I think that human knowledge is essentially active.
Jean PiagetWhen you teach a child something you take away forever his chance of discovering it for himself.
Jean PiagetWhat the genetic epistemology proposes is discovering the roots of the different varieties of knowledge, since its elementary forms, following to the next levels, including also the scientific knowledge.
Jean Piaget