To express the same idea in still another way, I think...
Quote by Jean Piaget about idea, knowledge, human imperfections
Knowing reality means constructing systems of...
Quote by Jean Piaget about reality
In a desperate situation, only courage and intelligence...
Quote by Jean Piaget about despair, intelligence, courage, help
Scientific knowledge is in perpetual evolution; it finds...
Quote by Jean Piaget about knowledge, evolution, day