Equilibrium is the profoundest tendency of all human activity.

It was while teaching philosophy that I saw how easily one can say ... what one wants to say. ... In fact, I became particularly aware if the dangers of speculation ... It's so much easier than digging out the facts. You sit in your office and build a system. But with my training in biology, I felt this kind of undertaking precarious.

The most developed science remains a continual becoming

Each time one prematurely teaches a child something he could have discovered himself, that child is kept from inventing it and consequently from understanding it completely.

How can we, with our adult minds, know what will be interesting? If you follow the child...you can find out something new.

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.

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