In fact, objects are known only through the subject, while the subject can know himself or her- self only by acting on objects materially and men- ta… - Jean Piaget

In fact, objects are known only through the subject, while the subject can know himself or her- self only by acting on objects materially and mentally. Indeed, if objects are innumerable and science indefinitely diverse, all knowledge of the subject brings us back to psychology, the science of the subject and the subject's actions.

One must have felt a real desire to exchange thoughts with others in order to discover all that a lie can involve. And this interchange of thoughts is from the first not possible between adults and children, because the initial inequality is too great and the child tries to imitate the adult and at the same time to protect himself against him rather than really to exchange thoughts with him. The situation we have described is thus almost the necessary outcome of unilateral respect. The spirit of the command having failed to be assimilated, the letter alone remains. Hence the phenomenon we have been observing. The child thinks of a lie as "what isn't true," independently of the subject's intentions. He even goes so far as to compare lies to those linguistic taboos, "naughty words." As for the judgment of responsibility, the further a lie is removed from reality, the more serious is the offense. Objective responsibility is thus the inevitable result of unilateral respect in its earliest stage.

A fact is first an answer to a question. If Sartre had consulted psychologists before judging them in the light of his own genius, he would have learned that they do not wait on the accident but begin by setting themselves problems.

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.