Arturo Portnoy

"I hear and I forget. I see and I remember. I do and I understand."

"One thousand repetitions answer all questions."

Confucius (551–479 BC)

"Self-education is, I firmly believe, the only kind of education there is."

Isaac Asimov (1920-1992)

Mathematical education is like sexual education: one must always teach the truth, but not all the truth at once. It's overwhelming!