If logic itself is created rather than being inborn, it follows that the first task of education is to form reasoning.

Every acquisition of accommodation becomes material for assimilation, but assimilation always resists new accommodations.

Play is the work of childhood.

Equilibrium is the profoundest tendency of all human activity.

Intelligence is what you use when you don't know what to do.

The self thus becomes aware of itself, at least in its practical action, and discovers itself as a cause among other causes and as an object subject to the same laws as other objects.

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.