The current state of knowledge is a moment in history, changing just as rapidly as the state of knowledge in the past has ever changed and, in many instances, more rapidly.

Punishment renders autonomy of conscience impossible.

Teaching means creating situations where structures can be discovered.

How much more precious is a little humanity than all the rules in the world.

I have always detested any departure from reality, an attitude which I relate to my mother's poor mental health.

What is desired is that the teacher ceased being a lecturer, satisfied with transmitting ready-made solutions. His role should rather be that of a mentor stimulating initiative and research.

Children require long, uniterrupted periods of play and exploration