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

What we see changes what we know. What we know changes what we see.

Play is the work of childhood.

The more we try to improve our schools, the heavier the teaching task becomes; and the better our teaching methods the more difficult they are to apply.

This means that no single logic is strong enough to support the total construction of human knowledge.

Moral autonomy appears when the mind regards as necessary an ideal that is independent of all external pressures.

Teaching means creating situations where structures can be discovered.