When you teach a child something you take away forever his chance of discovering it for himself.

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

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.

As you know, Bergson pointed out that there is no such thing as disorder but rather two sorts of order, geometric and living.

True interest appears when the self identifies itself with ideas or objects, when it finds in them a means of expression and they become a necessary form of fuel for its activity.

Logical positivists have never taken psychology into account in their epistemology, but they affirm that logical beings and mathematical beings are nothing but linguistic structures.

Play is the work of childhood.