Jean Piaget

The goal of education is not to increase the amount of knowledge but to create the possibilities for a child to invent and discover, to create men who are capable of doing new things.

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

Childish egocentrism is, in its essence, an inability to differentiate between the ego and the social environment.

Wikileaks in its essence is a publisher, pure and simple. They were very much in the same position as 'The New York Times' and 'The Guardian.'

Justice consists in doing no injury to men; decency in giving them no offense.

A free life cannot acquire many possessions, because this is not easy to do without servility to mobs or monarchs.