To understand is to invent.

We learn more when we are compelled to invent.

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

The more we try to improve our schools, the heavier the teaching task becomes; and the better our teaching methods the more difficult they are to apply.

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.

Only education is capable of saving our societies from possible collapse, whether violent, or gradual.

Chance... in the accommodation peculiar to sensorimotor intelligence, plays the same role as in scientific discovery. It is only useful to the genius and its revelations remain meaningless to the unskilled.