“Ignorance and inconsideration are the two great causes of the ruin of mankind.”
“A man profits more by the sight of an idiot than by the orations of the learned.”
“Most ignorance is evincible ignorance. We don't know because we don't want to know.”
“The reason there's so much ignorance is that those who have it are so eager to share it.”
“The highest form of ignorance is when you reject something you don't know anything about.”
“The greatest pride, or the greatest despondency, is the greatest ignorance of one's self.”
“Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity.”
“I would rather have my ignorance than another man's knowledge, because I have so much of it.”
“I do not pretend to know where many ignorant men are sure -- that is all that agnosticism means.”
“Naivete in grownups is often charming; but when coupled with vanity it is indistinguishable from stupidity.”
“He was so learned that he could name a horse in nine languages; so ignorant that he bought a cow to ride on.”
“There is one principle that can keep a man in everlasting ignorance. That is contempt prior to investigation.”
“Ignorance breeds monsters to fill up the vacancies of the soul that are unoccupied by the verities of knowledge.”
“Ignorance is never out of style. It was in fashion yesterday, it is the rage today and it will set the pace tomorrow.”
“Have the courage to be ignorant of a great number of things, in order to avoid the calamity of being ignorant of everything.”
“The sage awakes to light in the night of all creatures. That which the world calls day is the night of ignorance to the wise.”
“Ignorance is preferable to error; and he is less remote from the truth who believes nothing, than he who believes what is wrong.”
“There are many who talk on from ignorance rather than from knowledge, and who find the former an inexhaustible fund of conversation.”
“When I was fourteen, my father was so ignorant I could hardly stand to have him around. When I got to be twenty-one, I was astonished at how much he had learned in seven years.”
“A child-like man is not a man whose development has been arrested; on the contrary, he is a man who has given himself a chance of continuing to develop long after most adults have muffled themselves in the cocoon of middle-aged habit and convention.”
“The fact is that we all seem capable of living, because at some time or other we have taken refuge in a lie, in blindness, in enthusiasm, in optimism, in some conviction, in pessimism or something of the sort. He has never taken refuge in anything. He is absolutely incapable of lying. He has nothing to take refuge in, no shelter. It's as if he were naked and everyone else had clothes on.”