“The more one learns, the more he understands his ignorance.”

“The learned man understands the ignorant for he was once ignorant himself. The ignorant man does not understand the learned for he has never been learned himself.”

“Imperfect understanding is often more dangerous than ignorance.”

“You don't understand anything until you learn it more than one way.”

“A learned fool is more a fool than an ignorant fool.”

“Every person wishes to know of the proposals, the learned, and the ignorant. The learned understands the work proposed-he understands at least something, partly, or fully-but the ignorant and inexperienced understand nothing, not even when things are explained to them. Their ignorance moves them promptly to anger. They remain in ignorance because they want to show themselves learned, which they are not, and they move the other ignorant crowd to insistence on its own poor waysand to scorn for those who know.”