They say a little knowledge is a dangerous thing…

• A little learning is a dangerous thing. Alexander Pope
• A little knowledge is a dangerous thing. So is a lot. Albert Einstein
• If a little knowledge was a dangerous thing, a lot was lethal. Tom Sharpe
• Advertising is like learning – a little is a dangerous thing. T. Barnum
• A little learning is a dangerous thing but none at all is fatal. Roger Bacon
• A little knowledge is a dangerous thing. I regret that this isn’t fatal. Erik Naggum
• Half-knowledge is worse than ignorance.  Thomas B. Macaulay
• A little learning is a dangerous thing, but a little patronage more so. Charles Dickens
• Half-knowledge is worse than ignorance. Thomas B. Macaulay
• We know a little bit about a lot of things. Just enough to make us dangerous. Dean Winchester
• For we can only know that we know nothing, and a little knowledge is a dangerous thing. Zhuangzi
• True, a little learning is a dangerous thing, but it still beats total ignorance. Abigail Van Buren
• Better know nothing than half-know many things.  Friedrich Nietzsche
• If a little knowledge is dangerous, where is the man who has so much as to be out of danger? Thomas Huxley
• A little knowledge is a dangerous thing – it only hastens fools to rush in where angels fear to tread. Samuel Johnson
• They say a little knowledge is a dangerous thing, but it’s not one half so bad as a lot of ignorance. Terry Pratchett
• A little learning, indeed, may be a dangerous thing, but the want of learning is a calamity to any people. Frederick Douglass
• If a little dreaming is dangerous, the cure for it is not to dream less but to dream more, to dream all the time. Marcel Proust
• The first time a student realizes that a little learning is a dangerous thing is when he brings home a poor report card. Mark Twain
• A little learning is a dangerous thing, but we must take that risk because a little is as much as our biggest heads can hold. George Bernard Shaw
• A little learning is a dangerous thing; drink of it deeply, or taste it not, for shallow thoughts intoxicate the brain, and drinking deeply sobers us again. Alexander Pope
• But just as a little bit of knowledge is a dangerous thing, a little bit of energy, in the hands of someone hell-bent on suicide, is a very dangerous thing. Elizabeth Wurtzel
• You know that saying ‘A little knowledge is a dangerous thing’? That’s so true of positive psychology. Our latest research tells us that the pursuit of happiness is a delicate art. Certain approaches to seeking happiness are now known to backfire, whereas others are effective. Barbara Fredrickson
• The saying that a little knowledge is a dangerous thing is, to my mind, a very dangerous adage. If knowledge is real and genuine, I do not believe that it is other than a very valuable posession, however infinitesimal its quantity may be. Indeed, if a little knowledge is dangerous, where is a man who has so much as to be out of danger? Thomas Huxley

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…especially if we mistake it for a great deal…

• A little learning is not a dangerous thing to one who does not mistake it for a great deal. William Allen White

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…but ignorance is also dangerous and sometimes even fatal

• There’s nothing as safe as ignorance or as dangerous. Rex Stout
• There is a dangerous optimism of ignorance and indifference. Helen Keller
• A little learning is a dangerous thing but none at all is fatal. Roger Bacon
• Ignorance might be bliss, but it’s irresponsible and dangerous too. Robyn Carr
• Ignorance is indeed bliss, but it is also dangerous and embarrassing. Ted Nugent
• Beware of false knowledge; it is more dangerous than ignorance. George Bernard Shaw
• Ignorance, as they say, is usually fatal, but sometimes it can be bliss. Eoin Colfer
• Ignorance per se is not nearly as dangerous as ignorance of ignorance. Sydney J. Harris
• Ignorance is a dangerous and spiritual poison, which all men ought warily to shun. Pope Gregory I
• True, a little learning is a dangerous thing, but it still beats total ignorance. Abigail Van Buren
• It must certainly be more dangerous to live in ignorance than to live with knowledge. Frank Herbert
• Nothing is as dangerous as an ignorant friend; a wise enemy is to be preferred. Jean de La Fontaine
• An ignorant person is, by the very fact of his or her ignorance, a very dangerous person. Hendrik Willem van Loon
• They say a little knowledge is a dangerous thing, but it’s not one half so bad as a lot of ignorance. Terry Pratchett
• It is not the insurrections of ignorance that are dangerous, but the revolts of the intelligence. James Russell Lowell
• In my country we say that ignorance is the warm bath in which it is comfortable to sit but dangerous to lie down. Marina Lewycka
• The only thing more dangerous than ignorance is the pretense of intelligent ignorance. The former is teachable; the latter is not. Criss Jami
• For entrepreneurs, ignorance is not bliss. It’s fatal. It’s costly. And it’s for losers. You either get organized, or get crushed. Donald Trump
• Of all ignorance, the ignorance of the educated is the most dangerous. Not only are educated people likely to have more influence, they are the last people to suspect that they don’t know what they are talking about when they go outside their narrow fields. Thomas Sowell