“To express the same idea in still another way, I think that human knowledge is essentially active.”
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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.
This means that no single logic is strong enough to support the total construction of human knowledge.
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.