Quotes: Ignorance

Source:

"There are many things of which a wise man might wish to be ignorant."
 By Ralph Waldo Emerson

"I have observed that the world has suffered far less from ignorance than from pretensions to knowledge. It is not skeptics or explorers but fanatics and ideologues who menace decency and progress. No agnostic ever burned anyone at the stake or tortur."
By Daniel J. Boorstin

"I am not ashamed to confess I am ignorant of what I do not know."
By Marcus Tullius Cicero