"Few are those who can see with their own eyes and hear with their own hearts."
"To be ignorant of one’s own ignorance is the malady of the ignorant."
"It is impossible to make someone understand their own ignorance, for it requires knowledge to perceive it; and, therefore, he that can perceive it has it not."
"It is difficult to free fools from the chains they revere."
"To act without clear understanding, to form habits without investigation, to follow a path all one's life without knowing where it really leads; such is the behavior of the multitude."
“To most people, nothing is more troublesome than the effort of thinking.”
“Common sense is not a common virtue.”
"Education is a progressive discovery of our own ignorance."
- Will Durant
"There's lots of people.... this town wouldn't hold them; who don't know much excepting what's told them."
- Will Carleton
"A weak mind is like a microscope, which magnifies trifling things, but cannot receive great ones."
"Young men are apt to think themselves wise enough, as drunken men are apt to think themselves sober enough."
"Real knowledge is to know the extent of ones own ignorance."
"The first step to knowledge is to know that we are ignorant."
"Few people think more than two or three times a year; I have made an international reputation for myself by thinking once or twice a week."
- George Bernard Shaw
"Fullness of knowledge always means some understanding of the depth of our ignorance; and that is always conducive to humility and reverence."
- Robert Millikan