During the earliest stages the child perceives things like a solipsist who is unaware of himself as subject and is familiar only with his own actions.

Logic and mathematics are nothing but specialised linguistic structures.

Moral autonomy appears when the mind regards as necessary an ideal that is independent of all external pressures.

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.

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

How much more precious is a little humanity than all the rules in the world.

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.