Revealing quotes on ignorance will provide inspirational thought and reflection on some of people worst attitudes and thought processes. We are all not brilliant but there is a time to admit ignorance and attempt to do something about it whether that be keeping quiet so as not to reveal ignorance or to study the subject so at least you can offer a honest opinion based on fact.
"If ignorance is bliss then what is stupidity?" Byron Pulsifer
"Ignorance may account for all forms of transgression but what more can be said about those who refuse to learn or to understand that change is everywhere and can't be ignored." Byron Pulsifer
"Three minutes thought would suffice to find this out; but thought is irksome and three minutes is a long time." A.E. Houseman
"Two things are infinite: the universe and human stupidity; and I'm not sure about the universe." Albert Einstein
"Ignorance, the root and the stem of every evil." Plato
"Blessed is the man who, having nothing to stay, abstains from giving us worthy evidence of the fact." George Eliot
"We all know people who for depths of ignorance think they are experts on every subject." Byron Pulsifer
"Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity." Martin Luther King Jr.