The greatest ignorance is to reject something you know nothing about.
If you think education is expensive, try ignorance.
There is nothing more frightful than ignorance in action.
The recipe for perpetual ignorance is: Be satisfied with your opinions and content with your knowledge.
Nothing in the world is more dangerous than a sincere ignorance and conscientious stupidity.
There is only one good, knowledge, and one evil, ignorance.
Sometimes ignorance is innocence - stupidity comes with experience.
Most ignorance is vincible ignorance. We don't know because we don't want to know.
The two pillars of 'political correctness' are:
a) willful ignorance
b) a steadfast refusal to face the truth