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

We learn more when we are compelled to invent.

Play is the work of childhood.

Reflective abstraction, however, is based not on individual actions but on coordinated actions.

The most developed science remains a continual becoming

Teaching means creating situations where structures can be discovered.

The principal goal of education is to create men who are capable of doing new things, not simply of repeating what other generations have done-men who are creative, inventive, and discovers. The second goal of education is to form minds which can be critical, can verify, and not accept everything they are offered.