To express the same idea in still another way, I think that human knowledge is essentially active.
Intelligence is what you use when you don't know what to do.
How much more precious is a little humanity than all the rules in the world.
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.
We learn more when we are compelled to invent.
Teaching means creating situations where structures can be discovered.