Teaching means creating situations where structures can be discovered.

To understand is to invent.

Equilibrium is the profoundest tendency of all human activity.

How can we, with our adult minds, know what will be interesting? If you follow the child...you can find out something new.

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.

In genetic epistemology, as in developmental psychology, too, there is never an absolute beginning.

Each time one prematurely teaches a child something he could have discovered himself, that child is kept from inventing it and consequently from understanding it completely.