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.

To be ignorant of one's ignorance is the malady of the ignorant.

To be ignorant of one's ignorance is the malady of the ignorant.

Often the cock-loft is empty, in those whom nature hath built
many stories high.

Often the cock-loft is empty, in those whom nature hath built
many stories high.

And his best riches, ignorance of wealth.

And his best riches, ignorance of wealth.

The recipe for perpetual ignorance is: Be satisfied with your opinions and content with your knowledge.

The recipe for perpetual ignorance is: Be satisfied with your opinions and content with your knowledge.

For "ignorance is the mother of devotion," as all the world
knows.

For "ignorance is the mother of devotion," as all the world
knows.

Ignorance gives one a large range of probabilities.

Ignorance gives one a large range of probabilities.

It was a childish ignorance,
But now 'tis little joy
To know I'm further off from heaven
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It was a childish ignorance,
But now 'tis little joy
To know I'm further off from heaven
Than when I was a boy.

By ignorance we mistake, and by mistakes we learn

By ignorance we mistake, and by mistakes we learn