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

Play is the work of childhood.

What the genetic epistemology proposes is discovering the roots of the different varieties of knowledge, since its elementary forms, following to the next levels, including also the scientific knowledge.

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.

Scientific knowledge is in perpetual evolution; it finds itself changed from one day to the next.

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

Teaching means creating situations where structures can be discovered.