Teaching means creating situations where structures can be discovered.
What we see changes what we know. What we know changes what we see.
In genetic epistemology, as in developmental psychology, too, there is never an absolute beginning.
During the earliest stages the child perceives things like a solipsist who is unaware of himself as subject and is familiar only with his own actions.
How much more precious is a little humanity than all the rules in the world.
In other words, knowledge of the external world begins with an immediate utilisation of things, whereas knowledge of self is stopped by this purely practical and utilitarian contact.