I have always detested any departure from reality, an attitude which I relate to my mother's poor mental health.

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.

To understand is to invent.

Our problem, from the point of view of psychology and from the point of view of genetic epistemology, is to explain how the transition is made from a lower level of knowledge to a level that is judged to be higher.

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

Scientific thought, then, is not momentary; it is not a static instance; it is a process.

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