Children Require Long, Uniterrupted Periods Of Play

Reflective Abstraction, However, Is Based Not On Individual Actions But On Coordinated Actions.

Everytime We Teach A Child Something, We Prevent Him From Inventing It Himself.

Knowing Reality Means Constructing Systems Of Transformations That Correspond, More Or Less Adequately, To Reality.

To Understand Is To Invent.

Punishment Renders Autonomy Of Conscience Impossible.