When the child sees the parent looking for something, it is as natural for it also to look for the object and to give it over when it finds it, as it was, under other circumstances, to receive it. Multiply such an instance by the thousand details of daily intercourse, and one has a picture of the most permanent and enduring method of giving direction to the activities of the young.

Complete adaptation to environment means death. The essential point in all response is the desire to control environment.

There's all the difference in the world between having something to say, and having to say something.

As societies become more complex in structure and resources, the need of formal or intentional teaching and learning increases.

Mankind likes to think in terms of extreme opposites.

Every one of the constituent elements of a social group, in a modern city as in a savage tribe, is born immature, helpless, without language, beliefs, ideas, or social standards. Each individual, each unit who is the carrier of the life-experience of his group, in time passes away. Yet the life of the group goes on.

We cannot set up, out of our heads, something we regard as an ideal society.