“What we see changes what we know. What we know changes what we see.”

“Intelligence is what you use when you don't know what to do.”

“The principle goal of education in the schools should be creating men and women who are capable of doing new things, not simply repeating what other generations have done; men and women who are creative, inventive and discoverers, who can be critical and verify, and not accept, everything they are offered.”

“I could not think without writing.”

“Play is the answer to how anything new comes about.”

“Each time one prematurely teaches a child something he could have discovered himself, that child is kept from inventing it and consequently from understanding it completely.”

“We do not know what we want and yet we are responsible for what we are - that is the fact. ”