Nothing in all the world is more dangerous than sincere ignorance and conscientious stupidity.

Nothing in all the world is more dangerous than sincere ignorance and conscientious stupidity.

But let a man know that there are things to be known, of which he
is ignorant, and it read more

But let a man know that there are things to be known, of which he
is ignorant, and it is so much carved out of his domain of
universal knowledge.

Through ignorance of what is good and what is bad, the life of
men is greatly perplexed.
[Lat., read more

Through ignorance of what is good and what is bad, the life of
men is greatly perplexed.
[Lat., Ignoratione rerum bonarum et malarum maxime hominum vita
vexatur.]

Discussion is an exchange of knowledge; an argument an exchange of ignorance.

Discussion is an exchange of knowledge; an argument an exchange of ignorance.

. . where ignorance is bliss, 'Tis folly to be wise.

. . where ignorance is bliss, 'Tis folly to be wise.

Naivete in grownups is often charming; but when coupled with vanity it is indistinguishable from stupidity.

Naivete in grownups is often charming; but when coupled with vanity it is indistinguishable from stupidity.

And his best riches, ignorance of wealth.

And his best riches, ignorance of wealth.

I would prefer as friend a good man ignorant than one more clever who is evil too.

I would prefer as friend a good man ignorant than one more clever who is evil too.

If you think education is expensive, try ignorance.

If you think education is expensive, try ignorance.