In other words, knowledge of the external world begins with an immediate utilisation of things, whereas knowledge of self is stopped by this purely practical and utilitarian contact.
Scientific knowledge is in perpetual evolution it finds itself changed from one day to the next.
To express the same idea in still another way, I think that human knowledge is essentially active.
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.
This means that no single logic is strong enough to support the total construction of human knowledge.
The current state of knowledge is a moment in history, changing just as rapidly as the state of knowledge in the past has ever changed and, in many instances, more rapidly.
The principle goal of education in the schools should be creating men and women who are capable of doing new things, not simply repeating what other generations have done.
It is with children that we have the best chance of studying the development of logical knowledge, mathematical knowledge, physical knowledge, and so forth.
I have always detested any departure from reality, an attitude which I relate to my mother's poor mental health.