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