Children have real understanding only of that which they invent themselves, and each time that we try to teach them something too quickly, we keep them from reinventing it themselves. - Jean Piaget
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. - Jean Piaget
Thought Scientific thought, then, is not momentary; it is not a static instance; it is a process. - Jean Piaget
First Sense The first type of abstraction from objects I shall refer to as simple abstraction, but the second type I shall call reflective abstraction, using this term in a double sense. - Jean Piaget
Time On the one hand, there are individual actions such as throwing, pushing, touching, rubbing. It is these individual actions that give rise most of the time to abstraction from objects. - Jean Piaget
Logic You reason color more than you reason drawing... Color has a logic as severe as form. - Pierre Bonnard
Logic The much vaunted male logic isn't logical, because they display prejudices against half the human race that are considered prejudices according to any dictionary definition. - Eva Figes
Logic Years I noticed this process of waking, and predicted with terrifying logic that one of these years not far away I would be awake continuously and never slip back, and never be free of myself again. - Annie Dillard