"To be ignorant of one's ignorance is the malady of the ignorant."

"Our No. 1 enemy is ignorance. And I believe that is the No. 1 enemy for everyone — it's not understanding what actual…"

"You have to start with the truth. The truth is the only way that we can get anywhere. Because any decision-making tha…"

"Ignorance can be interesting. ∞ Also fatal."

"Be ignorance thy choice, where knowledge leads to woe."

"It is not my place to tell you whether there is indefeasible ignorance of ultimate reality. I am ignorant of whether …"

"A large segment of the American public is sadly deficient in its knowledge of basic business and economic facts of li…"

"It’s amazing how self-perpetuating ignorance is."

"Any time you combine ignorance and borrowed money, you can get some pretty interesting consequences."

"Ignorance, madam, pure ignorance."