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.
-- Jean Piaget
   
Jean Piaget   Name:
Jean Piaget
Type:
Psychologist
Nationality:
Swiss
Birth:
August 9, 1896
Death:
September 16, 1980
https://www.nutquote.com/quote/Jean_Piaget