Where knowledge is a duty, ignorance is a crime.

...the way I figure, no man has the right to be ignorant. In a country like this, ignorance is a crime. If a man is going to vote, if he's going to take part in his country and its government, then it's up to him to understand.

Only, the way I figure, no man has the right to be ignorant. In a country like this, ignorance is a crime. If a man is going to vote, if he’s going to take part in his country and its government, then it’s up to him to understand.

Ignorance is not innocence but sin.

Ignorance is fatal.

A man is responsible for his ignorance.

Ignorance is a kind of insanity in the human animal. People who delight in torturing defenseless children or tiny creatures are in reality insane. The terrible thing is that people who are madmen in private may wear a totally bland and innocent expression in public.

Blind commitment to a theory is not an intellectual virtue: it is an intellectual crime.

Ignorance is not a simple lack of knowledge but an active aversion to knowledge, the refusal to know, issuing from cowardice, pride or laziness of mind.

As scientific men we have all, no doubt, felt that our work has been put often to base uses, which must lead to disaster. But what sin is to the moralist and crime to the jurist so to the scientific man is ignorance. On our plane knowledge and ignorance are the immemorial adversaries.
Scientific men can hardly escape the charge of ignorance with regard to the precise effect of the impact of modern science upon the mode of living of the people and upon their civilisation. For them, such a charge is worse than that of crime.

Ignorance, the root and stem of every evil.

Ignorance, the root and stem of all evil.

Ignorance in other men may be censured as idleness, in an academick it must be abhorred as treachery.

To permit ignorance is to empower it. To do nothing as our leaders proclaim absurdities is a crime of complacency. As is letting our schools and churches teach outright untruths to our children.